iOS 2.4.2 - Fixed Swipe Action Colours

Reviewed-on: #6

android/app/build.gradle.kts

@@ -16,8 +16,8 @@ android {
         applicationId = "com.atridad.ascently"
         minSdk = 31
         targetSdk = 36
-        versionCode = 44
-        versionName = "2.2.0"
+        versionCode = 48
+        versionName = "2.4.0"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
     }
@@ -38,7 +38,10 @@ android {
 
     java { toolchain { languageVersion.set(JavaLanguageVersion.of(17)) } }
 
-    buildFeatures { compose = true }
+    buildFeatures {
+        compose = true
+        buildConfig = true
+    }
 }
 
 kotlin { compilerOptions { jvmTarget.set(JvmTarget.JVM_17) } }

android/app/src/main/AndroidManifest.xml

@@ -27,6 +27,7 @@
 
     <!-- Permissions for notifications and foreground service -->
     <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
+    <uses-permission android:name="android.permission.POST_PROMOTED_NOTIFICATIONS" />
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE_SPECIAL_USE" />
 

android/app/src/main/java/com/atridad/ascently/data/health/HealthConnectStub.kt

@@ -3,7 +3,7 @@ package com.atridad.ascently.data.health
 import android.annotation.SuppressLint
 import android.content.Context
 import android.content.SharedPreferences
-import android.util.Log
+import com.atridad.ascently.utils.AppLogger
 import androidx.activity.result.contract.ActivityResultContract
 import androidx.health.connect.client.HealthConnectClient
 import androidx.health.connect.client.PermissionController
@@ -31,7 +31,7 @@ import kotlinx.coroutines.flow.flow
 class HealthConnectManager(private val context: Context) {
 
     private val preferences: SharedPreferences =
-            context.getSharedPreferences("health_connect_prefs", Context.MODE_PRIVATE)
+        context.getSharedPreferences("health_connect_prefs", Context.MODE_PRIVATE)
 
     private val _isEnabled = MutableStateFlow(preferences.getBoolean("enabled", false))
     private val _hasPermissions = MutableStateFlow(preferences.getBoolean("permissions", false))
@@ -46,21 +46,21 @@ class HealthConnectManager(private val context: Context) {
         private const val TAG = "HealthConnectManager"
 
         val REQUIRED_PERMISSIONS =
-                setOf(
-                        HealthPermission.getReadPermission(ExerciseSessionRecord::class),
-                        HealthPermission.getWritePermission(ExerciseSessionRecord::class),
-                        HealthPermission.getReadPermission(HeartRateRecord::class),
-                        HealthPermission.getWritePermission(HeartRateRecord::class),
-                        HealthPermission.getReadPermission(TotalCaloriesBurnedRecord::class),
-                        HealthPermission.getWritePermission(TotalCaloriesBurnedRecord::class)
-                )
+            setOf(
+                HealthPermission.getReadPermission(ExerciseSessionRecord::class),
+                HealthPermission.getWritePermission(ExerciseSessionRecord::class),
+                HealthPermission.getReadPermission(HeartRateRecord::class),
+                HealthPermission.getWritePermission(HeartRateRecord::class),
+                HealthPermission.getReadPermission(TotalCaloriesBurnedRecord::class),
+                HealthPermission.getWritePermission(TotalCaloriesBurnedRecord::class)
+            )
     }
 
     private val healthConnectClient by lazy {
         try {
             HealthConnectClient.getOrCreate(context)
         } catch (e: Exception) {
-            Log.e(TAG, "Failed to create Health Connect client", e)
+            AppLogger.e(TAG, e) { "Failed to create Health Connect client" }
             _isCompatible.value = false
             null
         }
@@ -75,7 +75,7 @@ class HealthConnectManager(private val context: Context) {
             val status = HealthConnectClient.getSdkStatus(context)
             emit(status == HealthConnectClient.SDK_AVAILABLE)
         } catch (e: Exception) {
-            Log.e(TAG, "Error checking Health Connect availability", e)
+            AppLogger.e(TAG, e) { "Error checking Health Connect availability" }
             _isCompatible.value = false
             emit(false)
         }
@@ -90,10 +90,10 @@ class HealthConnectManager(private val context: Context) {
             try {
                 val alreadyHasPermissions = hasAllPermissions()
                 if (!alreadyHasPermissions) {
-                    Log.d(TAG, "Health Connect enabled - permissions will be requested by UI")
+                    AppLogger.d(TAG) { "Health Connect enabled - permissions will be requested by UI" }
                 }
             } catch (e: Exception) {
-                Log.w(TAG, "Error checking permissions when enabling Health Connect", e)
+                AppLogger.w(TAG, e) { "Error checking permissions when enabling Health Connect" }
             }
         } else if (!enabled) {
             setPermissionsGranted(false)
@@ -111,15 +111,15 @@ class HealthConnectManager(private val context: Context) {
                 return false
             }
             val grantedPermissions =
-                    healthConnectClient!!.permissionController.getGrantedPermissions()
+                healthConnectClient!!.permissionController.getGrantedPermissions()
             val hasAll =
-                    REQUIRED_PERMISSIONS.all { permission ->
-                        grantedPermissions.contains(permission)
-                    }
+                REQUIRED_PERMISSIONS.all { permission ->
+                    grantedPermissions.contains(permission)
+                }
             setPermissionsGranted(hasAll)
             hasAll
         } catch (e: Exception) {
-            Log.e(TAG, "Error checking permissions", e)
+            AppLogger.e(TAG, e) { "Error checking permissions" }
             setPermissionsGranted(false)
             false
         }
@@ -128,14 +128,14 @@ class HealthConnectManager(private val context: Context) {
     suspend fun isReady(): Boolean {
         return try {
             if (!_isEnabled.value || !_isCompatible.value || healthConnectClient == null)
-                    return false
+                return false
 
             val isAvailable =
-                    HealthConnectClient.getSdkStatus(context) == HealthConnectClient.SDK_AVAILABLE
+                HealthConnectClient.getSdkStatus(context) == HealthConnectClient.SDK_AVAILABLE
             val hasPerms = if (isAvailable) hasAllPermissions() else false
             isAvailable && hasPerms
         } catch (e: Exception) {
-            Log.e(TAG, "Error checking Health Connect readiness", e)
+            AppLogger.e(TAG, e) { "Error checking Health Connect readiness" }
             false
         }
     }
@@ -148,27 +148,27 @@ class HealthConnectManager(private val context: Context) {
         return try {
             REQUIRED_PERMISSIONS.map { it }.toSet()
         } catch (e: Exception) {
-            Log.e(TAG, "Error getting required permissions", e)
+            AppLogger.e(TAG, e) { "Error getting required permissions" }
             emptySet()
         }
     }
 
     @SuppressLint("RestrictedApi")
     suspend fun syncCompletedSession(
-            session: ClimbSession,
-            gymName: String,
-            attemptCount: Int = 0
+        session: ClimbSession,
+        gymName: String,
+        attemptCount: Int = 0
     ): Result<Unit> {
         return try {
             if (!isReady() || !_autoSync.value) {
                 return Result.failure(
-                        IllegalStateException("Health Connect not ready or auto-sync disabled")
+                    IllegalStateException("Health Connect not ready or auto-sync disabled")
                 )
             }
 
             if (session.status != SessionStatus.COMPLETED) {
                 return Result.failure(
-                        IllegalArgumentException("Only completed sessions can be synced")
+                    IllegalArgumentException("Only completed sessions can be synced")
                 )
             }
 
@@ -177,29 +177,29 @@ class HealthConnectManager(private val context: Context) {
 
             if (startTime == null || endTime == null) {
                 return Result.failure(
-                        IllegalArgumentException("Session must have valid start and end times")
+                    IllegalArgumentException("Session must have valid start and end times")
                 )
             }
 
-            Log.d(TAG, "Attempting to sync session '${session.id}' to Health Connect...")
+            AppLogger.d(TAG) { "Attempting to sync session '${session.id}' to Health Connect..." }
 
             val records = mutableListOf<androidx.health.connect.client.records.Record>()
 
             try {
                 val exerciseSession =
-                        ExerciseSessionRecord(
-                                startTime = startTime,
-                                startZoneOffset =
-                                        ZoneOffset.systemDefault().rules.getOffset(startTime),
-                                endTime = endTime,
-                                endZoneOffset = ZoneOffset.systemDefault().rules.getOffset(endTime),
-                                exerciseType =
-                                        ExerciseSessionRecord.EXERCISE_TYPE_STRENGTH_TRAINING,
-                                title = "Rock Climbing at $gymName"
-                        )
+                    ExerciseSessionRecord(
+                        startTime = startTime,
+                        startZoneOffset =
+                            ZoneOffset.systemDefault().rules.getOffset(startTime),
+                        endTime = endTime,
+                        endZoneOffset = ZoneOffset.systemDefault().rules.getOffset(endTime),
+                        exerciseType =
+                            ExerciseSessionRecord.EXERCISE_TYPE_STRENGTH_TRAINING,
+                        title = "Rock Climbing at $gymName"
+                    )
                 records.add(exerciseSession)
             } catch (e: Exception) {
-                Log.w(TAG, "Failed to create exercise session record", e)
+                AppLogger.w(TAG, e) { "Failed to create exercise session record" }
             }
 
             try {
@@ -208,75 +208,74 @@ class HealthConnectManager(private val context: Context) {
 
                 if (estimatedCalories > 0) {
                     val caloriesRecord =
-                            TotalCaloriesBurnedRecord(
-                                    startTime = startTime,
-                                    startZoneOffset =
-                                            ZoneOffset.systemDefault().rules.getOffset(startTime),
-                                    endTime = endTime,
-                                    endZoneOffset =
-                                            ZoneOffset.systemDefault().rules.getOffset(endTime),
-                                    energy = Energy.calories(estimatedCalories)
-                            )
+                        TotalCaloriesBurnedRecord(
+                            startTime = startTime,
+                            startZoneOffset =
+                                ZoneOffset.systemDefault().rules.getOffset(startTime),
+                            endTime = endTime,
+                            endZoneOffset =
+                                ZoneOffset.systemDefault().rules.getOffset(endTime),
+                            energy = Energy.calories(estimatedCalories)
+                        )
                     records.add(caloriesRecord)
                 }
             } catch (e: Exception) {
-                Log.w(TAG, "Failed to create calories record", e)
+                AppLogger.w(TAG, e) { "Failed to create calories record" }
             }
 
             try {
                 val heartRateRecord = createHeartRateRecord(startTime, endTime, attemptCount)
                 heartRateRecord?.let { records.add(it) }
             } catch (e: Exception) {
-                Log.w(TAG, "Failed to create heart rate record", e)
+                AppLogger.w(TAG, e) { "Failed to create heart rate record" }
             }
 
             if (records.isNotEmpty() && healthConnectClient != null) {
-                Log.d(TAG, "Writing ${records.size} records to Health Connect...")
+                AppLogger.d(TAG) { "Writing ${records.size} records to Health Connect..." }
                 healthConnectClient!!.insertRecords(records)
-                Log.i(
-                        TAG,
-                        "Successfully synced ${records.size} records for session '${session.id}' to Health Connect"
-                )
+                AppLogger.i(TAG) {
+                    "Successfully synced ${records.size} records for session '${session.id}' to Health Connect"
+                }
 
                 preferences
-                        .edit()
-                        .putString("last_sync_success", DateFormatUtils.nowISO8601())
-                        .apply()
+                    .edit()
+                    .putString("last_sync_success", DateFormatUtils.nowISO8601())
+                    .apply()
             } else {
                 val reason =
-                        when {
-                            records.isEmpty() -> "No records created"
-                            healthConnectClient == null -> "Health Connect client unavailable"
-                            else -> "Unknown reason"
-                        }
-                Log.w(TAG, "Sync failed for session '${session.id}': $reason")
+                    when {
+                        records.isEmpty() -> "No records created"
+                        healthConnectClient == null -> "Health Connect client unavailable"
+                        else -> "Unknown reason"
+                    }
+                AppLogger.w(TAG) { "Sync failed for session '${session.id}': $reason" }
                 return Result.failure(Exception("Sync failed: $reason"))
             }
 
             Result.success(Unit)
         } catch (e: Exception) {
-            Log.e(TAG, "Error syncing climbing session to Health Connect", e)
+            AppLogger.e(TAG, e) { "Error syncing climbing session to Health Connect" }
             Result.failure(e)
         }
     }
 
     suspend fun autoSyncCompletedSession(
-            session: ClimbSession,
-            gymName: String,
-            attemptCount: Int = 0
+        session: ClimbSession,
+        gymName: String,
+        attemptCount: Int = 0
     ): Result<Unit> {
         return if (_autoSync.value && isReady() && session.status == SessionStatus.COMPLETED) {
-            Log.d(TAG, "Auto-syncing completed session '${session.id}' to Health Connect...")
+            AppLogger.d(TAG) { "Auto-syncing completed session '${session.id}' to Health Connect..." }
             syncCompletedSession(session, gymName, attemptCount)
         } else {
             val reason =
-                    when {
-                        session.status != SessionStatus.COMPLETED -> "session not completed"
-                        !_autoSync.value -> "auto-sync disabled"
-                        !isReady() -> "Health Connect not ready"
-                        else -> "unknown reason"
-                    }
-            Log.d(TAG, "Auto-sync skipped for session '${session.id}': $reason")
+                when {
+                    session.status != SessionStatus.COMPLETED -> "session not completed"
+                    !_autoSync.value -> "auto-sync disabled"
+                    !isReady() -> "Health Connect not ready"
+                    else -> "unknown reason"
+                }
+            AppLogger.d(TAG) { "Auto-sync skipped for session '${session.id}': $reason" }
             Result.success(Unit)
         }
     }
@@ -284,30 +283,30 @@ class HealthConnectManager(private val context: Context) {
     private fun estimateCaloriesForClimbing(durationMinutes: Long, attemptCount: Int): Double {
         val baseCaloriesPerMinute = 8.0
         val intensityMultiplier =
-                when {
-                    attemptCount >= 20 -> 1.3
-                    attemptCount >= 10 -> 1.1
-                    else -> 0.9
-                }
+            when {
+                attemptCount >= 20 -> 1.3
+                attemptCount >= 10 -> 1.1
+                else -> 0.9
+            }
         return durationMinutes * baseCaloriesPerMinute * intensityMultiplier
     }
 
     @SuppressLint("RestrictedApi")
     private fun createHeartRateRecord(
-            startTime: Instant,
-            endTime: Instant,
-            attemptCount: Int
+        startTime: Instant,
+        endTime: Instant,
+        attemptCount: Int
     ): HeartRateRecord? {
         return try {
             val samples = mutableListOf<HeartRateRecord.Sample>()
             val intervalMinutes = 5L
 
             val baseHeartRate =
-                    when {
-                        attemptCount >= 20 -> 155L
-                        attemptCount >= 10 -> 145L
-                        else -> 135L
-                    }
+                when {
+                    attemptCount >= 20 -> 155L
+                    attemptCount >= 10 -> 145L
+                    else -> 135L
+                }
 
             var currentTime = startTime
             while (currentTime.isBefore(endTime)) {
@@ -321,14 +320,14 @@ class HealthConnectManager(private val context: Context) {
             if (samples.isEmpty()) return null
 
             HeartRateRecord(
-                    startTime = startTime,
-                    startZoneOffset = ZoneOffset.systemDefault().rules.getOffset(startTime),
-                    endTime = endTime,
-                    endZoneOffset = ZoneOffset.systemDefault().rules.getOffset(endTime),
-                    samples = samples
+                startTime = startTime,
+                startZoneOffset = ZoneOffset.systemDefault().rules.getOffset(startTime),
+                endTime = endTime,
+                endZoneOffset = ZoneOffset.systemDefault().rules.getOffset(endTime),
+                samples = samples
             )
         } catch (e: Exception) {
-            Log.e(TAG, "Error creating heart rate record", e)
+            AppLogger.e(TAG, e) { "Error creating heart rate record" }
             null
         }
     }

android/app/src/main/java/com/atridad/ascently/data/repository/ClimbRepository.kt

@@ -13,6 +13,7 @@ import com.atridad.ascently.data.format.DeletedItem
 import com.atridad.ascently.data.model.*
 import com.atridad.ascently.data.state.DataStateManager
 import com.atridad.ascently.utils.DateFormatUtils
+import com.atridad.ascently.utils.AppLogger
 import com.atridad.ascently.utils.ZipExportImportUtils
 import java.io.File
 import kotlinx.coroutines.flow.Flow
@@ -26,7 +27,7 @@ class ClimbRepository(database: AscentlyDatabase, private val context: Context)
     private val attemptDao = database.attemptDao()
     private val dataStateManager = DataStateManager(context)
     private val deletionPreferences: SharedPreferences =
-            context.getSharedPreferences("deleted_items", Context.MODE_PRIVATE)
+        context.getSharedPreferences("deleted_items", Context.MODE_PRIVATE)
 
     private var autoSyncCallback: (() -> Unit)? = null
 
@@ -43,11 +44,13 @@ class ClimbRepository(database: AscentlyDatabase, private val context: Context)
         dataStateManager.updateDataState()
         triggerAutoSync()
     }
+
     suspend fun updateGym(gym: Gym) {
         gymDao.updateGym(gym)
         dataStateManager.updateDataState()
         triggerAutoSync()
     }
+
     suspend fun deleteGym(gym: Gym) {
         gymDao.deleteGym(gym)
         trackDeletion(gym.id, "gym")
@@ -63,10 +66,12 @@ class ClimbRepository(database: AscentlyDatabase, private val context: Context)
         problemDao.insertProblem(problem)
         dataStateManager.updateDataState()
     }
+
     suspend fun updateProblem(problem: Problem) {
         problemDao.updateProblem(problem)
         dataStateManager.updateDataState()
     }
+
     suspend fun deleteProblem(problem: Problem) {
         problemDao.deleteProblem(problem)
         trackDeletion(problem.id, "problem")
@@ -77,7 +82,8 @@ class ClimbRepository(database: AscentlyDatabase, private val context: Context)
     fun getAllSessions(): Flow<List<ClimbSession>> = sessionDao.getAllSessions()
     suspend fun getSessionById(id: String): ClimbSession? = sessionDao.getSessionById(id)
     fun getSessionsByGym(gymId: String): Flow<List<ClimbSession>> =
-            sessionDao.getSessionsByGym(gymId)
+        sessionDao.getSessionsByGym(gymId)
+
     suspend fun getActiveSession(): ClimbSession? = sessionDao.getActiveSession()
     fun getActiveSessionFlow(): Flow<ClimbSession?> = sessionDao.getActiveSessionFlow()
     suspend fun insertSession(session: ClimbSession) {
@@ -88,6 +94,7 @@ class ClimbRepository(database: AscentlyDatabase, private val context: Context)
             triggerAutoSync()
         }
     }
+
     suspend fun updateSession(session: ClimbSession) {
         sessionDao.updateSession(session)
         dataStateManager.updateDataState()
@@ -96,12 +103,14 @@ class ClimbRepository(database: AscentlyDatabase, private val context: Context)
             triggerAutoSync()
         }
     }
+
     suspend fun deleteSession(session: ClimbSession) {
         sessionDao.deleteSession(session)
         trackDeletion(session.id, "session")
         dataStateManager.updateDataState()
         triggerAutoSync()
     }
+
     suspend fun getLastUsedGym(): Gym? {
         val recentSessions = sessionDao.getRecentSessions(1).first()
         return if (recentSessions.isNotEmpty()) {
@@ -114,17 +123,21 @@ class ClimbRepository(database: AscentlyDatabase, private val context: Context)
     // Attempt operations
     fun getAllAttempts(): Flow<List<Attempt>> = attemptDao.getAllAttempts()
     fun getAttemptsBySession(sessionId: String): Flow<List<Attempt>> =
-            attemptDao.getAttemptsBySession(sessionId)
+        attemptDao.getAttemptsBySession(sessionId)
+
     fun getAttemptsByProblem(problemId: String): Flow<List<Attempt>> =
-            attemptDao.getAttemptsByProblem(problemId)
+        attemptDao.getAttemptsByProblem(problemId)
+
     suspend fun insertAttempt(attempt: Attempt) {
         attemptDao.insertAttempt(attempt)
         dataStateManager.updateDataState()
     }
+
     suspend fun updateAttempt(attempt: Attempt) {
         attemptDao.updateAttempt(attempt)
         dataStateManager.updateDataState()
     }
+
     suspend fun deleteAttempt(attempt: Attempt) {
         attemptDao.deleteAttempt(attempt)
         trackDeletion(attempt.id, "attempt")
@@ -141,38 +154,38 @@ class ClimbRepository(database: AscentlyDatabase, private val context: Context)
             validateDataIntegrity(allGyms, allProblems, allSessions, allAttempts)
 
             val backupData =
-                    ClimbDataBackup(
-                            exportedAt = DateFormatUtils.nowISO8601(),
-                            version = "2.0",
-                            formatVersion = "2.0",
-                            gyms = allGyms.map { BackupGym.fromGym(it) },
-                            problems = allProblems.map { BackupProblem.fromProblem(it) },
-                            sessions = allSessions.map { BackupClimbSession.fromClimbSession(it) },
-                            attempts = allAttempts.map { BackupAttempt.fromAttempt(it) }
-                    )
+                ClimbDataBackup(
+                    exportedAt = DateFormatUtils.nowISO8601(),
+                    version = "2.0",
+                    formatVersion = "2.0",
+                    gyms = allGyms.map { BackupGym.fromGym(it) },
+                    problems = allProblems.map { BackupProblem.fromProblem(it) },
+                    sessions = allSessions.map { BackupClimbSession.fromClimbSession(it) },
+                    attempts = allAttempts.map { BackupAttempt.fromAttempt(it) }
+                )
 
             val referencedImagePaths = allProblems.flatMap { it.imagePaths }.toSet()
             val validImagePaths =
-                    referencedImagePaths
-                            .filter { imagePath ->
-                                try {
-                                    val imageFile =
-                                            com.atridad.ascently.utils.ImageUtils.getImageFile(
-                                                    context,
-                                                    imagePath
-                                            )
-                                    imageFile.exists() && imageFile.length() > 0
-                                } catch (_: Exception) {
-                                    false
-                                }
-                            }
-                            .toSet()
+                referencedImagePaths
+                    .filter { imagePath ->
+                        try {
+                            val imageFile =
+                                com.atridad.ascently.utils.ImageUtils.getImageFile(
+                                    context,
+                                    imagePath
+                                )
+                            imageFile.exists() && imageFile.length() > 0
+                        } catch (_: Exception) {
+                            false
+                        }
+                    }
+                    .toSet()
 
             ZipExportImportUtils.createExportZipToUri(
-                    context = context,
-                    uri = uri,
-                    exportData = backupData,
-                    referencedImagePaths = validImagePaths
+                context = context,
+                uri = uri,
+                exportData = backupData,
+                referencedImagePaths = validImagePaths
             )
         } catch (e: Exception) {
             throw Exception("Export failed: ${e.message}")
@@ -192,11 +205,11 @@ class ClimbRepository(database: AscentlyDatabase, private val context: Context)
             }
 
             val importData =
-                    try {
-                        json.decodeFromString<ClimbDataBackup>(importResult.jsonContent)
-                    } catch (e: Exception) {
-                        throw Exception("Invalid data format: ${e.message}")
-                    }
+                try {
+                    json.decodeFromString<ClimbDataBackup>(importResult.jsonContent)
+                } catch (e: Exception) {
+                    throw Exception("Invalid data format: ${e.message}")
+                }
 
             validateImportData(importData)
 
@@ -214,17 +227,17 @@ class ClimbRepository(database: AscentlyDatabase, private val context: Context)
             }
 
             val updatedBackupProblems =
-                    ZipExportImportUtils.updateProblemImagePaths(
-                            importData.problems,
-                            importResult.importedImagePaths
-                    )
+                ZipExportImportUtils.updateProblemImagePaths(
+                    importData.problems,
+                    importResult.importedImagePaths
+                )
 
             updatedBackupProblems.forEach { backupProblem ->
                 try {
                     problemDao.insertProblem(backupProblem.toProblem())
                 } catch (e: Exception) {
                     throw Exception(
-                            "Failed to import problem '${backupProblem.name}': ${e.message}"
+                        "Failed to import problem '${backupProblem.name}': ${e.message}"
                     )
                 }
             }
@@ -262,7 +275,7 @@ class ClimbRepository(database: AscentlyDatabase, private val context: Context)
     fun trackDeletion(itemId: String, itemType: String) {
         val currentDeletions = getDeletedItems().toMutableList()
         val newDeletion =
-                DeletedItem(id = itemId, type = itemType, deletedAt = DateFormatUtils.nowISO8601())
+            DeletedItem(id = itemId, type = itemType, deletedAt = DateFormatUtils.nowISO8601())
         currentDeletions.add(newDeletion)
 
         val json = json.encodeToString(newDeletion)
@@ -292,23 +305,23 @@ class ClimbRepository(database: AscentlyDatabase, private val context: Context)
     }
 
     private fun validateDataIntegrity(
-            gyms: List<Gym>,
-            problems: List<Problem>,
-            sessions: List<ClimbSession>,
-            attempts: List<Attempt>
+        gyms: List<Gym>,
+        problems: List<Problem>,
+        sessions: List<ClimbSession>,
+        attempts: List<Attempt>
     ) {
         val gymIds = gyms.map { it.id }.toSet()
         val invalidProblems = problems.filter { it.gymId !in gymIds }
         if (invalidProblems.isNotEmpty()) {
             throw Exception(
-                    "Data integrity error: ${invalidProblems.size} problems reference non-existent gyms"
+                "Data integrity error: ${invalidProblems.size} problems reference non-existent gyms"
             )
         }
 
         val invalidSessions = sessions.filter { it.gymId !in gymIds }
         if (invalidSessions.isNotEmpty()) {
             throw Exception(
-                    "Data integrity error: ${invalidSessions.size} sessions reference non-existent gyms"
+                "Data integrity error: ${invalidSessions.size} sessions reference non-existent gyms"
             )
         }
 
@@ -316,10 +329,10 @@ class ClimbRepository(database: AscentlyDatabase, private val context: Context)
         val sessionIds = sessions.map { it.id }.toSet()
 
         val invalidAttempts =
-                attempts.filter { it.problemId !in problemIds || it.sessionId !in sessionIds }
+            attempts.filter { it.problemId !in problemIds || it.sessionId !in sessionIds }
         if (invalidAttempts.isNotEmpty()) {
             throw Exception(
-                    "Data integrity error: ${invalidAttempts.size} attempts reference non-existent problems or sessions"
+                "Data integrity error: ${invalidAttempts.size} attempts reference non-existent problems or sessions"
             )
         }
     }
@@ -334,9 +347,9 @@ class ClimbRepository(database: AscentlyDatabase, private val context: Context)
         }
 
         if (importData.gyms.size > 1000 ||
-                        importData.problems.size > 10000 ||
-                        importData.sessions.size > 10000 ||
-                        importData.attempts.size > 100000
+            importData.problems.size > 10000 ||
+            importData.sessions.size > 10000 ||
+            importData.attempts.size > 100000
         ) {
             throw Exception("Import data is too large: possible corruption or malicious file")
         }
@@ -386,10 +399,10 @@ class ClimbRepository(database: AscentlyDatabase, private val context: Context)
             if (imagesDir.exists() && imagesDir.isDirectory) {
                 val deletedCount = imagesDir.listFiles()?.size ?: 0
                 imagesDir.deleteRecursively()
-                android.util.Log.i("ClimbRepository", "Cleared $deletedCount image files")
+                AppLogger.i("ClimbRepository") { "Cleared $deletedCount image files" }
             }
         } catch (e: Exception) {
-            android.util.Log.w("ClimbRepository", "Failed to clear some images: ${e.message}")
+            AppLogger.w("ClimbRepository", e) { "Failed to clear some images: ${e.message}" }
         }
     }
 }

android/app/src/main/java/com/atridad/ascently/data/state/DataStateManager.kt

@@ -2,8 +2,8 @@ package com.atridad.ascently.data.state
 
 import android.content.Context
 import android.content.SharedPreferences
-import android.util.Log
 import androidx.core.content.edit
+import com.atridad.ascently.utils.AppLogger
 import com.atridad.ascently.utils.DateFormatUtils
 
 /**
@@ -20,13 +20,13 @@ class DataStateManager(context: Context) {
     }
 
     private val prefs: SharedPreferences =
-            context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
+        context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
 
     init {
         if (!isInitialized()) {
             updateDataState()
             markAsInitialized()
-            Log.d(TAG, "DataStateManager initialized with timestamp: ${getLastModified()}")
+            AppLogger.d(TAG) { "DataStateManager initialized with timestamp: ${getLastModified()}" }
         }
     }
 
@@ -37,7 +37,7 @@ class DataStateManager(context: Context) {
     fun updateDataState() {
         val now = DateFormatUtils.nowISO8601()
         prefs.edit { putString(KEY_LAST_MODIFIED, now) }
-        Log.d(TAG, "Data state updated to: $now")
+        AppLogger.d(TAG) { "Data state updated to: $now" }
     }
 
     /**
@@ -46,7 +46,7 @@ class DataStateManager(context: Context) {
      */
     fun getLastModified(): String {
         return prefs.getString(KEY_LAST_MODIFIED, DateFormatUtils.nowISO8601())
-                ?: DateFormatUtils.nowISO8601()
+            ?: DateFormatUtils.nowISO8601()
     }
 
     /** Checks if the data state has been initialized. */

android/app/src/main/java/com/atridad/ascently/data/sync/AscentlySyncProvider.kt

@@ -0,0 +1,741 @@
+package com.atridad.ascently.data.sync
+
+import android.content.Context
+import android.content.SharedPreferences
+import android.net.ConnectivityManager
+import android.net.NetworkCapabilities
+import androidx.annotation.RequiresPermission
+import androidx.core.content.edit
+import com.atridad.ascently.data.format.BackupAttempt
+import com.atridad.ascently.data.format.BackupClimbSession
+import com.atridad.ascently.data.format.BackupGym
+import com.atridad.ascently.data.format.BackupProblem
+import com.atridad.ascently.data.format.ClimbDataBackup
+import com.atridad.ascently.data.repository.ClimbRepository
+import com.atridad.ascently.data.state.DataStateManager
+import com.atridad.ascently.utils.AppLogger
+import com.atridad.ascently.utils.DateFormatUtils
+import com.atridad.ascently.utils.ImageNamingUtils
+import com.atridad.ascently.utils.ImageUtils
+import java.io.IOException
+import java.text.SimpleDateFormat
+import java.util.Date
+import java.util.Locale
+import java.util.concurrent.TimeUnit
+import kotlinx.coroutines.CancellationException
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.withContext
+import kotlinx.serialization.json.Json
+import okhttp3.MediaType.Companion.toMediaType
+import okhttp3.OkHttpClient
+import okhttp3.Request
+import okhttp3.RequestBody.Companion.toRequestBody
+
+class AscentlySyncProvider(
+    private val context: Context,
+    private val repository: ClimbRepository
+) : SyncProvider {
+
+    override val type: SyncProviderType = SyncProviderType.SERVER
+
+    private val dataStateManager = DataStateManager(context)
+
+    companion object {
+        private const val TAG = "AscentlySyncProvider"
+    }
+
+    private val sharedPreferences: SharedPreferences =
+        context.getSharedPreferences("sync_preferences", Context.MODE_PRIVATE)
+
+    private val httpClient =
+        OkHttpClient.Builder()
+            .connectTimeout(45, TimeUnit.SECONDS)
+            .readTimeout(90, TimeUnit.SECONDS)
+            .writeTimeout(90, TimeUnit.SECONDS)
+            .build()
+
+    private val json = Json {
+        prettyPrint = true
+        ignoreUnknownKeys = true
+        explicitNulls = false
+        coerceInputValues = true
+    }
+
+    private val _isConnected = MutableStateFlow(false)
+    override val isConnected: StateFlow<Boolean> = _isConnected.asStateFlow()
+
+    private val _isConfigured = MutableStateFlow(false)
+    override val isConfigured: StateFlow<Boolean> = _isConfigured.asStateFlow()
+
+    private var isOfflineMode = false
+
+    private object Keys {
+        const val SERVER_URL = "server_url"
+        const val AUTH_TOKEN = "auth_token"
+        const val IS_CONNECTED = "is_connected"
+        const val LAST_SYNC_TIME = "last_sync_time"
+        const val OFFLINE_MODE = "offline_mode"
+    }
+
+    init {
+        loadInitialState()
+        updateConfiguredState()
+    }
+
+    private fun loadInitialState() {
+        _isConnected.value = sharedPreferences.getBoolean(Keys.IS_CONNECTED, false)
+        isOfflineMode = sharedPreferences.getBoolean(Keys.OFFLINE_MODE, false)
+    }
+
+    private fun updateConfiguredState() {
+        _isConfigured.value = serverUrl.isNotBlank() && authToken.isNotBlank()
+    }
+
+    var serverUrl: String
+        get() = sharedPreferences.getString(Keys.SERVER_URL, "") ?: ""
+        set(value) {
+            sharedPreferences.edit { putString(Keys.SERVER_URL, value) }
+            updateConfiguredState()
+            _isConnected.value = false
+            sharedPreferences.edit { putBoolean(Keys.IS_CONNECTED, false) }
+        }
+
+    var authToken: String
+        get() = sharedPreferences.getString(Keys.AUTH_TOKEN, "") ?: ""
+        set(value) {
+            sharedPreferences.edit { putString(Keys.AUTH_TOKEN, value) }
+            updateConfiguredState()
+            _isConnected.value = false
+            sharedPreferences.edit { putBoolean(Keys.IS_CONNECTED, false) }
+        }
+
+    @RequiresPermission(android.Manifest.permission.ACCESS_NETWORK_STATE)
+    private fun isNetworkAvailable(): Boolean {
+        val connectivityManager =
+            context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
+        val network = connectivityManager.activeNetwork ?: return false
+        val activeNetwork = connectivityManager.getNetworkCapabilities(network) ?: return false
+        return when {
+            activeNetwork.hasTransport(NetworkCapabilities.TRANSPORT_WIFI) -> true
+            activeNetwork.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) -> true
+            else -> false
+        }
+    }
+
+    @RequiresPermission(android.Manifest.permission.ACCESS_NETWORK_STATE)
+    override suspend fun sync() {
+        if (isOfflineMode) {
+            AppLogger.d(TAG) { "Sync skipped: Offline mode is enabled." }
+            return
+        }
+        if (!isNetworkAvailable()) {
+            AppLogger.d(TAG) { "Sync skipped: No internet connection." }
+            throw SyncException.NetworkError("No internet connection.")
+        }
+        if (!_isConfigured.value) {
+            throw SyncException.NotConfigured
+        }
+        if (!_isConnected.value) {
+            throw SyncException.NotConnected
+        }
+
+        val localBackup = createBackupFromRepository()
+        val serverBackup = downloadData()
+
+        val hasLocalData =
+            localBackup.gyms.isNotEmpty() ||
+                    localBackup.problems.isNotEmpty() ||
+                    localBackup.sessions.isNotEmpty() ||
+                    localBackup.attempts.isNotEmpty()
+
+        val hasServerData =
+            serverBackup.gyms.isNotEmpty() ||
+                    serverBackup.problems.isNotEmpty() ||
+                    serverBackup.sessions.isNotEmpty() ||
+                    serverBackup.attempts.isNotEmpty()
+
+        val lastSyncTimeStr = sharedPreferences.getString(Keys.LAST_SYNC_TIME, null)
+        if (hasLocalData && hasServerData && lastSyncTimeStr != null) {
+            AppLogger.d(TAG) { "Using delta sync for incremental updates" }
+            performDeltaSync(lastSyncTimeStr)
+        } else {
+            when {
+                !hasLocalData && hasServerData -> {
+                    AppLogger.d(TAG) { "No local data found, performing full restore from server" }
+                    val imagePathMapping = syncImagesFromServer(serverBackup)
+                    importBackupToRepository(serverBackup, imagePathMapping)
+                    AppLogger.d(TAG) { "Full restore completed" }
+                }
+
+                hasLocalData && !hasServerData -> {
+                    AppLogger.d(TAG) { "No server data found, uploading local data to server" }
+                    uploadData(localBackup)
+                    syncImagesForBackup(localBackup)
+                    AppLogger.d(TAG) { "Initial upload completed" }
+                }
+
+                hasLocalData && hasServerData -> {
+                    AppLogger.d(TAG) { "Both local and server data exist, merging (server wins)" }
+                    mergeDataSafely(serverBackup)
+                    AppLogger.d(TAG) { "Merge completed" }
+                }
+
+                else -> {
+                    AppLogger.d(TAG) { "No data to sync" }
+                }
+            }
+        }
+
+        val now = DateFormatUtils.nowISO8601()
+        sharedPreferences.edit { putString(Keys.LAST_SYNC_TIME, now) }
+    }
+
+    override fun disconnect() {
+        serverUrl = ""
+        authToken = ""
+        _isConnected.value = false
+        sharedPreferences.edit {
+            remove(Keys.LAST_SYNC_TIME)
+            putBoolean(Keys.IS_CONNECTED, false)
+        }
+        updateConfiguredState()
+    }
+
+    private suspend fun performDeltaSync(lastSyncTimeStr: String) {
+        AppLogger.d(TAG) { "Starting delta sync with lastSyncTime=$lastSyncTimeStr" }
+
+        val lastSyncDate = parseISO8601(lastSyncTimeStr) ?: Date(0)
+
+        val allGyms = repository.getAllGyms().first()
+        val modifiedGyms =
+            allGyms
+                .filter { gym -> parseISO8601(gym.updatedAt)?.after(lastSyncDate) == true }
+                .map { BackupGym.fromGym(it) }
+
+        val allProblems = repository.getAllProblems().first()
+        val modifiedProblems =
+            allProblems
+                .filter { problem ->
+                    parseISO8601(problem.updatedAt)?.after(lastSyncDate) == true
+                }
+                .map { problem ->
+                    val backupProblem = BackupProblem.fromProblem(problem)
+                    val normalizedImagePaths =
+                        problem.imagePaths.mapIndexed { index, _ ->
+                            ImageNamingUtils.generateImageFilename(problem.id, index)
+                        }
+                    if (normalizedImagePaths.isNotEmpty()) {
+                        backupProblem.copy(imagePaths = normalizedImagePaths)
+                    } else {
+                        backupProblem
+                    }
+                }
+
+        val allSessions = repository.getAllSessions().first()
+        val modifiedSessions =
+            allSessions
+                .filter { session ->
+                    parseISO8601(session.updatedAt)?.after(lastSyncDate) == true
+                }
+                .map { BackupClimbSession.fromClimbSession(it) }
+
+        val allAttempts = repository.getAllAttempts().first()
+        val modifiedAttempts =
+            allAttempts
+                .filter { attempt ->
+                    parseISO8601(attempt.createdAt)?.after(lastSyncDate) == true
+                }
+                .map { BackupAttempt.fromAttempt(it) }
+
+        val allDeletions = repository.getDeletedItems()
+        val modifiedDeletions =
+            allDeletions.filter { item ->
+                parseISO8601(item.deletedAt)?.after(lastSyncDate) == true
+            }
+
+        AppLogger.d(TAG) {
+            "Delta sync sending: gyms=${modifiedGyms.size}, problems=${modifiedProblems.size}, sessions=${modifiedSessions.size}, attempts=${modifiedAttempts.size}, deletions=${modifiedDeletions.size}"
+        }
+
+        val deltaRequest =
+            DeltaSyncRequest(
+                lastSyncTime = lastSyncTimeStr,
+                gyms = modifiedGyms,
+                problems = modifiedProblems,
+                sessions = modifiedSessions,
+                attempts = modifiedAttempts,
+                deletedItems = modifiedDeletions
+            )
+
+        val requestBody =
+            json.encodeToString(DeltaSyncRequest.serializer(), deltaRequest)
+                .toRequestBody("application/json".toMediaType())
+
+        val request =
+            Request.Builder()
+                .url("$serverUrl/sync/delta")
+                .header("Authorization", "Bearer $authToken")
+                .post(requestBody)
+                .build()
+
+        val deltaResponse =
+            withContext(Dispatchers.IO) {
+                try {
+                    httpClient.newCall(request).execute().use { response ->
+                        if (response.isSuccessful) {
+                            val body = response.body?.string()
+                            if (!body.isNullOrEmpty()) {
+                                json.decodeFromString(DeltaSyncResponse.serializer(), body)
+                            } else {
+                                throw SyncException.InvalidResponse("Empty response body")
+                            }
+                        } else {
+                            handleHttpError(response.code)
+                        }
+                    }
+                } catch (e: IOException) {
+                    throw SyncException.NetworkError(e.message ?: "Network error")
+                }
+            }
+
+        AppLogger.d(TAG) {
+            "Delta sync received: gyms=${deltaResponse.gyms.size}, problems=${deltaResponse.problems.size}, sessions=${deltaResponse.sessions.size}, attempts=${deltaResponse.attempts.size}, deletions=${deltaResponse.deletedItems.size}"
+        }
+
+        applyDeltaResponse(deltaResponse)
+        syncModifiedImages(modifiedProblems)
+    }
+
+    private fun parseISO8601(dateString: String): Date? {
+        return try {
+            val format = SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss", Locale.US)
+            format.parse(dateString)
+        } catch (_: Exception) {
+            null
+        }
+    }
+
+    private suspend fun applyDeltaResponse(response: DeltaSyncResponse) {
+        // SyncService handles the "isSyncing" state to prevent recursive sync triggers
+        // when the repository is modified during a sync operation.
+
+        try {
+            // Merge and apply deletions first to prevent resurrection
+            val allDeletions = repository.getDeletedItems() + response.deletedItems
+            val uniqueDeletions = allDeletions.distinctBy { "${it.type}:${it.id}" }
+
+            AppLogger.d(TAG) { "Applying ${uniqueDeletions.size} deletion records before merging data" }
+            applyDeletions(uniqueDeletions)
+
+            // Build deleted item lookup set
+            val deletedItemSet = uniqueDeletions.map { "${it.type}:${it.id}" }.toSet()
+
+            // Download images for new/modified problems from server
+            val imagePathMapping = mutableMapOf<String, String>()
+            for (problem in response.problems) {
+                if (deletedItemSet.contains("problem:${problem.id}")) {
+                    continue
+                }
+                problem.imagePaths?.forEach { imagePath ->
+                    val serverFilename = imagePath.substringAfterLast('/')
+                    try {
+                        val localImagePath = downloadImage(serverFilename)
+                        if (localImagePath != null) {
+                            imagePathMapping[imagePath] = localImagePath
+                        }
+                    } catch (e: Exception) {
+                        AppLogger.w(TAG) { "Failed to download image $imagePath: ${e.message}" }
+                    }
+                }
+            }
+
+            // Merge gyms
+            val existingGyms = repository.getAllGyms().first()
+            for (backupGym in response.gyms) {
+                if (deletedItemSet.contains("gym:${backupGym.id}")) {
+                    continue
+                }
+                val existing = existingGyms.find { it.id == backupGym.id }
+                if (existing == null || backupGym.updatedAt >= existing.updatedAt) {
+                    val gym = backupGym.toGym()
+                    if (existing != null) {
+                        repository.updateGym(gym)
+                    } else {
+                        repository.insertGym(gym)
+                    }
+                }
+            }
+
+            // Merge problems
+            val existingProblems = repository.getAllProblems().first()
+            for (backupProblem in response.problems) {
+                if (deletedItemSet.contains("problem:${backupProblem.id}")) {
+                    continue
+                }
+                val updatedImagePaths =
+                    backupProblem.imagePaths?.map { oldPath ->
+                        imagePathMapping[oldPath] ?: oldPath
+                    }
+                val problemToMerge = backupProblem.copy(imagePaths = updatedImagePaths)
+                val problem = problemToMerge.toProblem()
+
+                val existing = existingProblems.find { it.id == backupProblem.id }
+                if (existing == null || backupProblem.updatedAt >= existing.updatedAt) {
+                    if (existing != null) {
+                        repository.updateProblem(problem)
+                    } else {
+                        repository.insertProblem(problem)
+                    }
+                }
+            }
+
+            // Merge sessions
+            val existingSessions = repository.getAllSessions().first()
+            for (backupSession in response.sessions) {
+                if (deletedItemSet.contains("session:${backupSession.id}")) {
+                    continue
+                }
+                val session = backupSession.toClimbSession()
+                val existing = existingSessions.find { it.id == backupSession.id }
+                if (existing == null || backupSession.updatedAt >= existing.updatedAt) {
+                    if (existing != null) {
+                        repository.updateSession(session)
+                    } else {
+                        repository.insertSession(session)
+                    }
+                }
+            }
+
+            // Merge attempts
+            val existingAttempts = repository.getAllAttempts().first()
+            for (backupAttempt in response.attempts) {
+                if (deletedItemSet.contains("attempt:${backupAttempt.id}")) {
+                    continue
+                }
+                val attempt = backupAttempt.toAttempt()
+                val existing = existingAttempts.find { it.id == backupAttempt.id }
+                if (existing == null || backupAttempt.createdAt >= existing.createdAt) {
+                    if (existing != null) {
+                        repository.updateAttempt(attempt)
+                    } else {
+                        repository.insertAttempt(attempt)
+                    }
+                }
+            }
+
+            // Apply deletions again for safety
+            applyDeletions(uniqueDeletions)
+
+            // Update deletion records
+            repository.clearDeletedItems()
+            uniqueDeletions.forEach { repository.trackDeletion(it.id, it.type) }
+        } catch (e: Exception) {
+            AppLogger.e(TAG, e) { "Error applying delta response" }
+            throw e
+        }
+    }
+
+    private suspend fun applyDeletions(
+        deletions: List<com.atridad.ascently.data.format.DeletedItem>
+    ) {
+        val existingGyms = repository.getAllGyms().first()
+        val existingProblems = repository.getAllProblems().first()
+        val existingSessions = repository.getAllSessions().first()
+        val existingAttempts = repository.getAllAttempts().first()
+
+        for (item in deletions) {
+            when (item.type) {
+                "gym" -> {
+                    existingGyms.find { it.id == item.id }?.let { repository.deleteGym(it) }
+                }
+
+                "problem" -> {
+                    existingProblems.find { it.id == item.id }?.let { repository.deleteProblem(it) }
+                }
+
+                "session" -> {
+                    existingSessions.find { it.id == item.id }?.let { repository.deleteSession(it) }
+                }
+
+                "attempt" -> {
+                    existingAttempts.find { it.id == item.id }?.let { repository.deleteAttempt(it) }
+                }
+            }
+        }
+    }
+
+    private suspend fun syncModifiedImages(modifiedProblems: List<BackupProblem>) {
+        if (modifiedProblems.isEmpty()) return
+
+        AppLogger.d(TAG) { "Syncing images for ${modifiedProblems.size} modified problems" }
+
+        for (backupProblem in modifiedProblems) {
+            backupProblem.imagePaths?.forEach { imagePath ->
+                val filename = imagePath.substringAfterLast('/')
+                uploadImage(imagePath, filename)
+            }
+        }
+    }
+
+    private suspend fun downloadData(): ClimbDataBackup {
+        val request =
+            Request.Builder()
+                .url("$serverUrl/sync")
+                .header("Authorization", "Bearer $authToken")
+                .get()
+                .build()
+
+        return withContext(Dispatchers.IO) {
+            try {
+                httpClient.newCall(request).execute().use { response ->
+                    if (response.isSuccessful) {
+                        val body = response.body?.string()
+                        if (!body.isNullOrEmpty()) {
+                            json.decodeFromString(body)
+                        } else {
+                            ClimbDataBackup(
+                                exportedAt = DateFormatUtils.nowISO8601(),
+                                gyms = emptyList(),
+                                problems = emptyList(),
+                                sessions = emptyList(),
+                                attempts = emptyList()
+                            )
+                        }
+                    } else {
+                        handleHttpError(response.code)
+                    }
+                }
+            } catch (e: IOException) {
+                throw SyncException.NetworkError(e.message ?: "Network error")
+            }
+        }
+    }
+
+    private suspend fun uploadData(backup: ClimbDataBackup) {
+        val requestBody =
+            json.encodeToString(backup).toRequestBody("application/json".toMediaType())
+
+        val request =
+            Request.Builder()
+                .url("$serverUrl/sync")
+                .header("Authorization", "Bearer $authToken")
+                .put(requestBody)
+                .build()
+
+        withContext(Dispatchers.IO) {
+            try {
+                httpClient.newCall(request).execute().use { response ->
+                    if (!response.isSuccessful) {
+                        handleHttpError(response.code)
+                    }
+                }
+            } catch (e: IOException) {
+                throw SyncException.NetworkError(e.message ?: "Network error")
+            }
+        }
+    }
+
+    private suspend fun syncImagesFromServer(backup: ClimbDataBackup): Map<String, String> {
+        val imagePathMapping = mutableMapOf<String, String>()
+        val totalImages = backup.problems.sumOf { it.imagePaths?.size ?: 0 }
+        AppLogger.d(TAG) { "Starting image download from server for $totalImages images" }
+
+        withContext(Dispatchers.IO) {
+            backup.problems.forEach { problem ->
+                problem.imagePaths?.forEach { imagePath ->
+                    val serverFilename = imagePath.substringAfterLast('/')
+                    try {
+                        val localImagePath = downloadImage(serverFilename)
+                        if (localImagePath != null) {
+                            imagePathMapping[imagePath] = localImagePath
+                        }
+                    } catch (_: SyncException.ImageNotFound) {
+                        AppLogger.w(TAG) { "Image not found on server: $imagePath" }
+                    } catch (e: CancellationException) {
+                        throw e
+                    } catch (e: Exception) {
+                        AppLogger.w(TAG) { "Failed to download image $imagePath: ${e.message}" }
+                    }
+                }
+            }
+        }
+        return imagePathMapping
+    }
+
+    private suspend fun downloadImage(serverFilename: String): String? {
+        val request =
+            Request.Builder()
+                .url("$serverUrl/images/download?filename=$serverFilename")
+                .header("Authorization", "Bearer $authToken")
+                .build()
+
+        return withContext(Dispatchers.IO) {
+            try {
+                httpClient.newCall(request).execute().use { response ->
+                    if (response.isSuccessful) {
+                        response.body?.bytes()?.let {
+                            ImageUtils.saveImageFromBytesWithFilename(context, it, serverFilename)
+                        }
+                    } else {
+                        if (response.code == 404) throw SyncException.ImageNotFound
+                        null
+                    }
+                }
+            } catch (e: IOException) {
+                AppLogger.e(TAG, e) { "Network error downloading image $serverFilename" }
+                null
+            }
+        }
+    }
+
+    private suspend fun syncImagesForBackup(backup: ClimbDataBackup) {
+        AppLogger.d(TAG) { "Starting image sync for backup with ${backup.problems.size} problems" }
+        withContext(Dispatchers.IO) {
+            backup.problems.forEach { problem ->
+                problem.imagePaths?.forEach { localPath ->
+                    val filename = localPath.substringAfterLast('/')
+                    uploadImage(localPath, filename)
+                }
+            }
+        }
+    }
+
+    private suspend fun uploadImage(localPath: String, filename: String) {
+        val file = ImageUtils.getImageFile(context, localPath)
+        if (!file.exists()) {
+            AppLogger.w(TAG) { "Local image file not found, cannot upload: $localPath" }
+            return
+        }
+
+        val requestBody = file.readBytes().toRequestBody("application/octet-stream".toMediaType())
+
+        val request =
+            Request.Builder()
+                .url("$serverUrl/images/upload?filename=$filename")
+                .header("Authorization", "Bearer $authToken")
+                .post(requestBody)
+                .build()
+
+        withContext(Dispatchers.IO) {
+            try {
+                httpClient.newCall(request).execute().use { response ->
+                    if (response.isSuccessful) {
+                        AppLogger.d(TAG) { "Successfully uploaded image: $filename" }
+                    } else {
+                        AppLogger.w(TAG) {
+                            "Failed to upload image $filename. Server responded with ${response.code}"
+                        }
+                    }
+                }
+            } catch (e: IOException) {
+                AppLogger.e(TAG, e) { "Network error uploading image $filename" }
+            }
+        }
+    }
+
+    private suspend fun createBackupFromRepository(): ClimbDataBackup {
+        return withContext(Dispatchers.Default) {
+            ClimbDataBackup(
+                exportedAt = dataStateManager.getLastModified(),
+                gyms = repository.getAllGyms().first().map { BackupGym.fromGym(it) },
+                problems =
+                    repository.getAllProblems().first().map { problem ->
+                        val backupProblem = BackupProblem.fromProblem(problem)
+                        val normalizedImagePaths =
+                            problem.imagePaths.mapIndexed { index, _ ->
+                                ImageNamingUtils.generateImageFilename(
+                                    problem.id,
+                                    index
+                                )
+                            }
+                        if (normalizedImagePaths.isNotEmpty()) {
+                            backupProblem.copy(imagePaths = normalizedImagePaths)
+                        } else {
+                            backupProblem
+                        }
+                    },
+                sessions =
+                    repository.getAllSessions().first().map {
+                        BackupClimbSession.fromClimbSession(it)
+                    },
+                attempts =
+                    repository.getAllAttempts().first().map {
+                        BackupAttempt.fromAttempt(it)
+                    },
+                deletedItems = repository.getDeletedItems()
+            )
+        }
+    }
+
+    private suspend fun importBackupToRepository(
+        backup: ClimbDataBackup,
+        imagePathMapping: Map<String, String>
+    ) {
+        val gyms = backup.gyms.map { it.toGym() }
+        val problems =
+            backup.problems.map { backupProblem ->
+                val imagePaths = backupProblem.imagePaths
+                val updatedImagePaths =
+                    imagePaths?.map { oldPath -> imagePathMapping[oldPath] ?: oldPath }
+                backupProblem.copy(imagePaths = updatedImagePaths).toProblem()
+            }
+        val sessions = backup.sessions.map { it.toClimbSession() }
+        val attempts = backup.attempts.map { it.toAttempt() }
+
+        repository.resetAllData()
+
+        gyms.forEach { repository.insertGymWithoutSync(it) }
+        problems.forEach { repository.insertProblemWithoutSync(it) }
+        sessions.forEach { repository.insertSessionWithoutSync(it) }
+        attempts.forEach { repository.insertAttemptWithoutSync(it) }
+
+        repository.clearDeletedItems()
+    }
+
+    private suspend fun mergeDataSafely(serverBackup: ClimbDataBackup) {
+        AppLogger.d(TAG) { "Server data will overwrite local data. Performing full restore." }
+        val imagePathMapping = syncImagesFromServer(serverBackup)
+        importBackupToRepository(serverBackup, imagePathMapping)
+    }
+
+    private fun handleHttpError(code: Int): Nothing {
+        when (code) {
+            401 -> throw SyncException.Unauthorized
+            in 500..599 -> throw SyncException.ServerError(code)
+            else -> throw SyncException.InvalidResponse("HTTP error code: $code")
+        }
+    }
+
+    override suspend fun testConnection() {
+        if (!_isConfigured.value) {
+            _isConnected.value = false
+            throw SyncException.NotConfigured
+        }
+
+        val request =
+            Request.Builder()
+                .url("$serverUrl/sync")
+                .header("Authorization", "Bearer $authToken")
+                .head()
+                .build()
+        try {
+            withContext(Dispatchers.IO) {
+                httpClient.newCall(request).execute().use { response ->
+                    _isConnected.value = response.isSuccessful || response.code == 405
+                }
+            }
+            if (!_isConnected.value) {
+                throw SyncException.NotConnected
+            }
+        } catch (e: Exception) {
+            _isConnected.value = false
+            throw SyncException.NetworkError(e.message ?: "Connection error")
+        } finally {
+            sharedPreferences.edit { putBoolean(Keys.IS_CONNECTED, _isConnected.value) }
+        }
+    }
+}

android/app/src/main/java/com/atridad/ascently/data/sync/SyncException.kt

@@ -0,0 +1,21 @@
+package com.atridad.ascently.data.sync
+
+import java.io.IOException
+import java.io.Serializable
+
+sealed class SyncException(message: String) : IOException(message), Serializable {
+    object NotConfigured :
+        SyncException("Sync is not configured. Please set server URL and auth token.")
+
+    object NotConnected : SyncException("Not connected to server. Please test connection first.")
+
+    object Unauthorized : SyncException("Unauthorized. Please check your auth token.")
+
+    object ImageNotFound : SyncException("Image not found on server")
+
+    data class ServerError(val code: Int) : SyncException("Server error: HTTP $code")
+    data class InvalidResponse(val details: String) :
+        SyncException("Invalid server response: $details")
+
+    data class NetworkError(val details: String) : SyncException("Network error: $details")
+}

android/app/src/main/java/com/atridad/ascently/data/sync/SyncProvider.kt

@@ -0,0 +1,18 @@
+package com.atridad.ascently.data.sync
+
+import kotlinx.coroutines.flow.StateFlow
+
+interface SyncProvider {
+    val type: SyncProviderType
+    val isConfigured: StateFlow<Boolean>
+    val isConnected: StateFlow<Boolean>
+    
+    suspend fun sync()
+    suspend fun testConnection()
+    fun disconnect()
+}
+
+enum class SyncProviderType {
+    NONE,
+    SERVER
+}

android/app/src/main/java/com/atridad/ascently/data/sync/SyncService.kt

@@ -2,27 +2,9 @@ package com.atridad.ascently.data.sync
 
 import android.content.Context
 import android.content.SharedPreferences
-import android.net.ConnectivityManager
-import android.net.NetworkCapabilities
-import android.util.Log
-import androidx.annotation.RequiresPermission
 import androidx.core.content.edit
-import com.atridad.ascently.data.format.BackupAttempt
-import com.atridad.ascently.data.format.BackupClimbSession
-import com.atridad.ascently.data.format.BackupGym
-import com.atridad.ascently.data.format.BackupProblem
-import com.atridad.ascently.data.format.ClimbDataBackup
 import com.atridad.ascently.data.repository.ClimbRepository
-import com.atridad.ascently.data.state.DataStateManager
-import com.atridad.ascently.utils.DateFormatUtils
-import com.atridad.ascently.utils.ImageNamingUtils
-import com.atridad.ascently.utils.ImageUtils
-import java.io.IOException
-import java.io.Serializable
-import java.text.SimpleDateFormat
-import java.util.Date
-import java.util.Locale
-import java.util.concurrent.TimeUnit
+import com.atridad.ascently.utils.AppLogger
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
@@ -31,43 +13,21 @@ import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.asStateFlow
-import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.sync.Mutex
 import kotlinx.coroutines.sync.withLock
-import kotlinx.coroutines.withContext
-import kotlinx.serialization.json.Json
-import okhttp3.MediaType.Companion.toMediaType
-import okhttp3.OkHttpClient
-import okhttp3.Request
-import okhttp3.RequestBody.Companion.toRequestBody
 
 class SyncService(private val context: Context, private val repository: ClimbRepository) {
 
-    private val dataStateManager = DataStateManager(context)
-    private val syncMutex = Mutex()
     private val serviceScope = CoroutineScope(Dispatchers.IO + SupervisorJob())
+    private val syncMutex = Mutex()
 
     companion object {
         private const val TAG = "SyncService"
     }
 
-    private val sharedPreferences: SharedPreferences =
-            context.getSharedPreferences("sync_preferences", Context.MODE_PRIVATE)
-
-    private val httpClient =
-            OkHttpClient.Builder()
-                    .connectTimeout(45, TimeUnit.SECONDS)
-                    .readTimeout(90, TimeUnit.SECONDS)
-                    .writeTimeout(90, TimeUnit.SECONDS)
-                    .build()
-
-    private val json = Json {
-        prettyPrint = true
-        ignoreUnknownKeys = true
-        explicitNulls = false
-        coerceInputValues = true
-    }
+    // Currently we only support one provider, but this allows for future expansion
+    private val provider: SyncProvider = AscentlySyncProvider(context, repository)
 
     // State
     private val _isSyncing = MutableStateFlow(false)
@@ -79,11 +39,9 @@ class SyncService(private val context: Context, private val repository: ClimbRep
     private val _syncError = MutableStateFlow<String?>(null)
     val syncError: StateFlow<String?> = _syncError.asStateFlow()
 
-    private val _isConnected = MutableStateFlow(false)
-    val isConnected: StateFlow<Boolean> = _isConnected.asStateFlow()
-
-    private val _isConfigured = MutableStateFlow(false)
-    val isConfiguredFlow: StateFlow<Boolean> = _isConfigured.asStateFlow()
+    // Delegate to provider
+    val isConnected: StateFlow<Boolean> = provider.isConnected
+    val isConfiguredFlow: StateFlow<Boolean> = provider.isConfigured
 
     private val _isTesting = MutableStateFlow(false)
     val isTesting: StateFlow<Boolean> = _isTesting.asStateFlow()
@@ -91,56 +49,40 @@ class SyncService(private val context: Context, private val repository: ClimbRep
     private val _isAutoSyncEnabled = MutableStateFlow(true)
     val isAutoSyncEnabled: StateFlow<Boolean> = _isAutoSyncEnabled.asStateFlow()
 
-    private var isOfflineMode = false
-
     // Debounced sync properties
     private var syncJob: Job? = null
     private var pendingChanges = false
     private val syncDebounceDelay = 2000L // 2 seconds
 
-    // Configuration keys
+    private val sharedPreferences: SharedPreferences =
+        context.getSharedPreferences("sync_preferences", Context.MODE_PRIVATE)
+
     private object Keys {
-        const val SERVER_URL = "server_url"
-        const val AUTH_TOKEN = "auth_token"
-        const val IS_CONNECTED = "is_connected"
         const val LAST_SYNC_TIME = "last_sync_time"
         const val AUTO_SYNC_ENABLED = "auto_sync_enabled"
-        const val OFFLINE_MODE = "offline_mode"
     }
 
     init {
         loadInitialState()
-        updateConfiguredState()
         repository.setAutoSyncCallback { serviceScope.launch { triggerAutoSync() } }
     }
 
     private fun loadInitialState() {
         _lastSyncTime.value = sharedPreferences.getString(Keys.LAST_SYNC_TIME, null)
-        _isConnected.value = sharedPreferences.getBoolean(Keys.IS_CONNECTED, false)
         _isAutoSyncEnabled.value = sharedPreferences.getBoolean(Keys.AUTO_SYNC_ENABLED, true)
-        isOfflineMode = sharedPreferences.getBoolean(Keys.OFFLINE_MODE, false)
-    }
-
-    private fun updateConfiguredState() {
-        _isConfigured.value = serverUrl.isNotBlank() && authToken.isNotBlank()
     }
 
+    // Proxy properties for Ascently provider configuration
     var serverUrl: String
-        get() = sharedPreferences.getString(Keys.SERVER_URL, "") ?: ""
+        get() = (provider as? AscentlySyncProvider)?.serverUrl ?: ""
         set(value) {
-            sharedPreferences.edit { putString(Keys.SERVER_URL, value) }
-            updateConfiguredState()
-            _isConnected.value = false
-            sharedPreferences.edit { putBoolean(Keys.IS_CONNECTED, false) }
+            (provider as? AscentlySyncProvider)?.serverUrl = value
         }
 
     var authToken: String
-        get() = sharedPreferences.getString(Keys.AUTH_TOKEN, "") ?: ""
+        get() = (provider as? AscentlySyncProvider)?.authToken ?: ""
         set(value) {
-            sharedPreferences.edit { putString(Keys.AUTH_TOKEN, value) }
-            updateConfiguredState()
-            _isConnected.value = false
-            sharedPreferences.edit { putBoolean(Keys.IS_CONNECTED, false) }
+            (provider as? AscentlySyncProvider)?.authToken = value
         }
 
     fun setAutoSyncEnabled(enabled: Boolean) {
@@ -148,90 +90,21 @@ class SyncService(private val context: Context, private val repository: ClimbRep
         sharedPreferences.edit { putBoolean(Keys.AUTO_SYNC_ENABLED, enabled) }
     }
 
-    @RequiresPermission(android.Manifest.permission.ACCESS_NETWORK_STATE)
-    private fun isNetworkAvailable(): Boolean {
-        val connectivityManager =
-                context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
-        val network = connectivityManager.activeNetwork ?: return false
-        val activeNetwork = connectivityManager.getNetworkCapabilities(network) ?: return false
-        return when {
-            activeNetwork.hasTransport(NetworkCapabilities.TRANSPORT_WIFI) -> true
-            activeNetwork.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) -> true
-            else -> false
-        }
-    }
-
-    @RequiresPermission(android.Manifest.permission.ACCESS_NETWORK_STATE)
     suspend fun syncWithServer() {
-        if (isOfflineMode) {
-            Log.d(TAG, "Sync skipped: Offline mode is enabled.")
-            return
-        }
-        if (!isNetworkAvailable()) {
-            _syncError.value = "No internet connection."
-            Log.d(TAG, "Sync skipped: No internet connection.")
-            return
-        }
-        if (!_isConfigured.value) {
+        if (!isConfiguredFlow.value) {
             throw SyncException.NotConfigured
         }
-        if (!_isConnected.value) {
-            throw SyncException.NotConnected
-        }
 
         syncMutex.withLock {
             _isSyncing.value = true
             _syncError.value = null
 
             try {
-                val localBackup = createBackupFromRepository()
-                val serverBackup = downloadData()
-
-                val hasLocalData =
-                        localBackup.gyms.isNotEmpty() ||
-                                localBackup.problems.isNotEmpty() ||
-                                localBackup.sessions.isNotEmpty() ||
-                                localBackup.attempts.isNotEmpty()
-
-                val hasServerData =
-                        serverBackup.gyms.isNotEmpty() ||
-                                serverBackup.problems.isNotEmpty() ||
-                                serverBackup.sessions.isNotEmpty() ||
-                                serverBackup.attempts.isNotEmpty()
-
-                // If both client and server have been synced before, use delta sync
-                val lastSyncTimeStr = sharedPreferences.getString(Keys.LAST_SYNC_TIME, null)
-                if (hasLocalData && hasServerData && lastSyncTimeStr != null) {
-                    Log.d(TAG, "Using delta sync for incremental updates")
-                    performDeltaSync(lastSyncTimeStr)
-                } else {
-                    when {
-                        !hasLocalData && hasServerData -> {
-                            Log.d(TAG, "No local data found, performing full restore from server")
-                            val imagePathMapping = syncImagesFromServer(serverBackup)
-                            importBackupToRepository(serverBackup, imagePathMapping)
-                            Log.d(TAG, "Full restore completed")
-                        }
-                        hasLocalData && !hasServerData -> {
-                            Log.d(TAG, "No server data found, uploading local data to server")
-                            uploadData(localBackup)
-                            syncImagesForBackup(localBackup)
-                            Log.d(TAG, "Initial upload completed")
-                        }
-                        hasLocalData && hasServerData -> {
-                            Log.d(TAG, "Both local and server data exist, merging (server wins)")
-                            mergeDataSafely(serverBackup)
-                            Log.d(TAG, "Merge completed")
-                        }
-                        else -> {
-                            Log.d(TAG, "No data to sync")
-                        }
-                    }
-                }
-
-                val now = DateFormatUtils.nowISO8601()
-                _lastSyncTime.value = now
-                sharedPreferences.edit { putString(Keys.LAST_SYNC_TIME, now) }
+                provider.sync()
+                
+                // Update last sync time from shared prefs (provider updates it)
+                _lastSyncTime.value = sharedPreferences.getString(Keys.LAST_SYNC_TIME, null)
+                
             } catch (e: Exception) {
                 _syncError.value = e.message
                 throw e
@@ -241,528 +114,21 @@ class SyncService(private val context: Context, private val repository: ClimbRep
         }
     }
 
-    private suspend fun performDeltaSync(lastSyncTimeStr: String) {
-        Log.d(TAG, "Starting delta sync with lastSyncTime=$lastSyncTimeStr")
-
-        // Parse last sync time to filter modified items
-        val lastSyncDate = parseISO8601(lastSyncTimeStr) ?: Date(0)
-
-        // Collect items modified since last sync
-        val allGyms = repository.getAllGyms().first()
-        val modifiedGyms =
-                allGyms
-                        .filter { gym -> parseISO8601(gym.updatedAt)?.after(lastSyncDate) == true }
-                        .map { BackupGym.fromGym(it) }
-
-        val allProblems = repository.getAllProblems().first()
-        val modifiedProblems =
-                allProblems
-                        .filter { problem ->
-                            parseISO8601(problem.updatedAt)?.after(lastSyncDate) == true
-                        }
-                        .map { problem ->
-                            val backupProblem = BackupProblem.fromProblem(problem)
-                            val normalizedImagePaths =
-                                    problem.imagePaths.mapIndexed { index, _ ->
-                                        ImageNamingUtils.generateImageFilename(problem.id, index)
-                                    }
-                            if (normalizedImagePaths.isNotEmpty()) {
-                                backupProblem.copy(imagePaths = normalizedImagePaths)
-                            } else {
-                                backupProblem
-                            }
-                        }
-
-        val allSessions = repository.getAllSessions().first()
-        val modifiedSessions =
-                allSessions
-                        .filter { session ->
-                            parseISO8601(session.updatedAt)?.after(lastSyncDate) == true
-                        }
-                        .map { BackupClimbSession.fromClimbSession(it) }
-
-        val allAttempts = repository.getAllAttempts().first()
-        val modifiedAttempts =
-                allAttempts
-                        .filter { attempt ->
-                            parseISO8601(attempt.createdAt)?.after(lastSyncDate) == true
-                        }
-                        .map { BackupAttempt.fromAttempt(it) }
-
-        val allDeletions = repository.getDeletedItems()
-        val modifiedDeletions =
-                allDeletions.filter { item ->
-                    parseISO8601(item.deletedAt)?.after(lastSyncDate) == true
-                }
-
-        Log.d(
-                TAG,
-                "Delta sync sending: gyms=${modifiedGyms.size}, problems=${modifiedProblems.size}, sessions=${modifiedSessions.size}, attempts=${modifiedAttempts.size}, deletions=${modifiedDeletions.size}"
-        )
-
-        // Create delta request
-        val deltaRequest =
-                DeltaSyncRequest(
-                        lastSyncTime = lastSyncTimeStr,
-                        gyms = modifiedGyms,
-                        problems = modifiedProblems,
-                        sessions = modifiedSessions,
-                        attempts = modifiedAttempts,
-                        deletedItems = modifiedDeletions
-                )
-
-        val requestBody =
-                json.encodeToString(DeltaSyncRequest.serializer(), deltaRequest)
-                        .toRequestBody("application/json".toMediaType())
-
-        val request =
-                Request.Builder()
-                        .url("$serverUrl/sync/delta")
-                        .header("Authorization", "Bearer $authToken")
-                        .post(requestBody)
-                        .build()
-
-        val deltaResponse =
-                withContext(Dispatchers.IO) {
-                    try {
-                        httpClient.newCall(request).execute().use { response ->
-                            if (response.isSuccessful) {
-                                val body = response.body?.string()
-                                if (!body.isNullOrEmpty()) {
-                                    json.decodeFromString(DeltaSyncResponse.serializer(), body)
-                                } else {
-                                    throw SyncException.InvalidResponse("Empty response body")
-                                }
-                            } else {
-                                handleHttpError(response.code)
-                            }
-                        }
-                    } catch (e: IOException) {
-                        throw SyncException.NetworkError(e.message ?: "Network error")
-                    }
-                }
-
-        Log.d(
-                TAG,
-                "Delta sync received: gyms=${deltaResponse.gyms.size}, problems=${deltaResponse.problems.size}, sessions=${deltaResponse.sessions.size}, attempts=${deltaResponse.attempts.size}, deletions=${deltaResponse.deletedItems.size}"
-        )
-
-        // Apply server changes to local data
-        applyDeltaResponse(deltaResponse)
-
-        // Sync only modified problem images
-        syncModifiedImages(modifiedProblems)
-    }
-
-    private fun parseISO8601(dateString: String): Date? {
-        return try {
-            val format = SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss", Locale.US)
-            format.parse(dateString)
-        } catch (e: Exception) {
-            null
-        }
-    }
-
-    private suspend fun applyDeltaResponse(response: DeltaSyncResponse) {
-        // Temporarily disable auto-sync to prevent recursive sync triggers
-        repository.setAutoSyncCallback(null)
-
-        try {
-            // Download images for new/modified problems from server
-            val imagePathMapping = mutableMapOf<String, String>()
-            for (problem in response.problems) {
-                problem.imagePaths?.forEach { imagePath ->
-                    val serverFilename = imagePath.substringAfterLast('/')
-                    try {
-                        val localImagePath = downloadImage(serverFilename)
-                        if (localImagePath != null) {
-                            imagePathMapping[imagePath] = localImagePath
-                        }
-                    } catch (e: Exception) {
-                        Log.w(TAG, "Failed to download image $imagePath: ${e.message}")
-                    }
-                }
-            }
-
-            // Merge gyms - check if exists and compare timestamps
-            val existingGyms = repository.getAllGyms().first()
-            for (backupGym in response.gyms) {
-                val existing = existingGyms.find { it.id == backupGym.id }
-                if (existing == null || backupGym.updatedAt >= existing.updatedAt) {
-                    val gym = backupGym.toGym()
-                    if (existing != null) {
-                        repository.updateGym(gym)
-                    } else {
-                        repository.insertGym(gym)
-                    }
-                }
-            }
-
-            // Merge problems
-            val existingProblems = repository.getAllProblems().first()
-            for (backupProblem in response.problems) {
-                val updatedImagePaths =
-                        backupProblem.imagePaths?.map { oldPath ->
-                            imagePathMapping[oldPath] ?: oldPath
-                        }
-                val problemToMerge = backupProblem.copy(imagePaths = updatedImagePaths)
-                val problem = problemToMerge.toProblem()
-
-                val existing = existingProblems.find { it.id == backupProblem.id }
-                if (existing == null || backupProblem.updatedAt >= existing.updatedAt) {
-                    if (existing != null) {
-                        repository.updateProblem(problem)
-                    } else {
-                        repository.insertProblem(problem)
-                    }
-                }
-            }
-
-            // Merge sessions
-            val existingSessions = repository.getAllSessions().first()
-            for (backupSession in response.sessions) {
-                val session = backupSession.toClimbSession()
-                val existing = existingSessions.find { it.id == backupSession.id }
-                if (existing == null || backupSession.updatedAt >= existing.updatedAt) {
-                    if (existing != null) {
-                        repository.updateSession(session)
-                    } else {
-                        repository.insertSession(session)
-                    }
-                }
-            }
-
-            // Merge attempts
-            val existingAttempts = repository.getAllAttempts().first()
-            for (backupAttempt in response.attempts) {
-                val attempt = backupAttempt.toAttempt()
-                val existing = existingAttempts.find { it.id == backupAttempt.id }
-                if (existing == null || backupAttempt.createdAt >= existing.createdAt) {
-                    if (existing != null) {
-                        repository.updateAttempt(attempt)
-                    } else {
-                        repository.insertAttempt(attempt)
-                    }
-                }
-            }
-
-            // Apply deletions
-            applyDeletions(response.deletedItems)
-
-            // Update deletion records
-            val allDeletions = repository.getDeletedItems() + response.deletedItems
-            repository.clearDeletedItems()
-            allDeletions.distinctBy { "${it.type}:${it.id}" }.forEach {
-                repository.trackDeletion(it.id, it.type)
-            }
-        } finally {
-            // Re-enable auto-sync
-            repository.setAutoSyncCallback { serviceScope.launch { triggerAutoSync() } }
-        }
-    }
-
-    private suspend fun applyDeletions(
-            deletions: List<com.atridad.ascently.data.format.DeletedItem>
-    ) {
-        val existingGyms = repository.getAllGyms().first()
-        val existingProblems = repository.getAllProblems().first()
-        val existingSessions = repository.getAllSessions().first()
-        val existingAttempts = repository.getAllAttempts().first()
-
-        for (item in deletions) {
-            when (item.type) {
-                "gym" -> {
-                    existingGyms.find { it.id == item.id }?.let { repository.deleteGym(it) }
-                }
-                "problem" -> {
-                    existingProblems.find { it.id == item.id }?.let { repository.deleteProblem(it) }
-                }
-                "session" -> {
-                    existingSessions.find { it.id == item.id }?.let { repository.deleteSession(it) }
-                }
-                "attempt" -> {
-                    existingAttempts.find { it.id == item.id }?.let { repository.deleteAttempt(it) }
-                }
-            }
-        }
-    }
-
-    private suspend fun syncModifiedImages(modifiedProblems: List<BackupProblem>) {
-        if (modifiedProblems.isEmpty()) return
-
-        Log.d(TAG, "Syncing images for ${modifiedProblems.size} modified problems")
-
-        for (backupProblem in modifiedProblems) {
-            backupProblem.imagePaths?.forEach { imagePath ->
-                val filename = imagePath.substringAfterLast('/')
-                uploadImage(imagePath, filename)
-            }
-        }
-    }
-
-    private suspend fun downloadData(): ClimbDataBackup {
-        val request =
-                Request.Builder()
-                        .url("$serverUrl/sync")
-                        .header("Authorization", "Bearer $authToken")
-                        .get()
-                        .build()
-
-        return withContext(Dispatchers.IO) {
-            try {
-                httpClient.newCall(request).execute().use { response ->
-                    if (response.isSuccessful) {
-                        val body = response.body?.string()
-                        if (!body.isNullOrEmpty()) {
-                            json.decodeFromString(body)
-                        } else {
-                            ClimbDataBackup(
-                                    exportedAt = DateFormatUtils.nowISO8601(),
-                                    gyms = emptyList(),
-                                    problems = emptyList(),
-                                    sessions = emptyList(),
-                                    attempts = emptyList()
-                            )
-                        }
-                    } else {
-                        handleHttpError(response.code)
-                    }
-                }
-            } catch (e: IOException) {
-                throw SyncException.NetworkError(e.message ?: "Network error")
-            }
-        }
-    }
-
-    private suspend fun uploadData(backup: ClimbDataBackup) {
-        val requestBody =
-                json.encodeToString(backup).toRequestBody("application/json".toMediaType())
-
-        val request =
-                Request.Builder()
-                        .url("$serverUrl/sync")
-                        .header("Authorization", "Bearer $authToken")
-                        .post(requestBody)
-                        .build()
-
-        withContext(Dispatchers.IO) {
-            try {
-                httpClient.newCall(request).execute().use { response ->
-                    if (!response.isSuccessful) {
-                        handleHttpError(response.code)
-                    }
-                }
-            } catch (e: IOException) {
-                throw SyncException.NetworkError(e.message ?: "Network error")
-            }
-        }
-    }
-
-    private suspend fun syncImagesFromServer(backup: ClimbDataBackup): Map<String, String> {
-        val imagePathMapping = mutableMapOf<String, String>()
-        val totalImages = backup.problems.sumOf { it.imagePaths?.size ?: 0 }
-        Log.d(TAG, "Starting image download from server for $totalImages images")
-
-        withContext(Dispatchers.IO) {
-            backup.problems.forEach { problem ->
-                problem.imagePaths?.forEach { imagePath ->
-                    val serverFilename = imagePath.substringAfterLast('/')
-                    try {
-                        val localImagePath = downloadImage(serverFilename)
-                        if (localImagePath != null) {
-                            imagePathMapping[imagePath] = localImagePath
-                        }
-                    } catch (_: SyncException.ImageNotFound) {
-                        Log.w(TAG, "Image not found on server: $imagePath")
-                    } catch (e: Exception) {
-                        Log.w(TAG, "Failed to download image $imagePath: ${e.message}")
-                    }
-                }
-            }
-        }
-        return imagePathMapping
-    }
-
-    private suspend fun downloadImage(serverFilename: String): String? {
-        val request =
-                Request.Builder()
-                        .url("$serverUrl/images/download?filename=$serverFilename")
-                        .header("Authorization", "Bearer $authToken")
-                        .build()
-
-        return withContext(Dispatchers.IO) {
-            try {
-                httpClient.newCall(request).execute().use { response ->
-                    if (response.isSuccessful) {
-                        response.body?.bytes()?.let {
-                            ImageUtils.saveImageFromBytesWithFilename(context, it, serverFilename)
-                        }
-                    } else {
-                        if (response.code == 404) throw SyncException.ImageNotFound
-                        null
-                    }
-                }
-            } catch (e: IOException) {
-                Log.e(TAG, "Network error downloading image $serverFilename", e)
-                null
-            }
-        }
-    }
-
-    private suspend fun syncImagesForBackup(backup: ClimbDataBackup) {
-        Log.d(TAG, "Starting image sync for backup with ${backup.problems.size} problems")
-        withContext(Dispatchers.IO) {
-            backup.problems.forEach { problem ->
-                problem.imagePaths?.forEach { localPath ->
-                    val filename = localPath.substringAfterLast('/')
-                    uploadImage(localPath, filename)
-                }
-            }
-        }
-    }
-
-    private suspend fun uploadImage(localPath: String, filename: String) {
-        val file = ImageUtils.getImageFile(context, localPath)
-        if (!file.exists()) {
-            Log.w(TAG, "Local image file not found, cannot upload: $localPath")
-            return
-        }
-
-        val requestBody = file.readBytes().toRequestBody("application/octet-stream".toMediaType())
-
-        val request =
-                Request.Builder()
-                        .url("$serverUrl/images/upload?filename=$filename")
-                        .header("Authorization", "Bearer $authToken")
-                        .post(requestBody)
-                        .build()
-
-        withContext(Dispatchers.IO) {
-            try {
-                httpClient.newCall(request).execute().use { response ->
-                    if (response.isSuccessful) {
-                        Log.d(TAG, "Successfully uploaded image: $filename")
-                    } else {
-                        Log.w(
-                                TAG,
-                                "Failed to upload image $filename. Server responded with ${response.code}"
-                        )
-                    }
-                }
-            } catch (e: IOException) {
-                Log.e(TAG, "Network error uploading image $filename", e)
-            }
-        }
-    }
-
-    private suspend fun createBackupFromRepository(): ClimbDataBackup {
-        return withContext(Dispatchers.Default) {
-            ClimbDataBackup(
-                    exportedAt = dataStateManager.getLastModified(),
-                    gyms = repository.getAllGyms().first().map { BackupGym.fromGym(it) },
-                    problems =
-                            repository.getAllProblems().first().map { problem ->
-                                val backupProblem = BackupProblem.fromProblem(problem)
-                                val normalizedImagePaths =
-                                        problem.imagePaths.mapIndexed { index, _ ->
-                                            ImageNamingUtils.generateImageFilename(
-                                                    problem.id,
-                                                    index
-                                            )
-                                        }
-                                if (normalizedImagePaths.isNotEmpty()) {
-                                    backupProblem.copy(imagePaths = normalizedImagePaths)
-                                } else {
-                                    backupProblem
-                                }
-                            },
-                    sessions =
-                            repository.getAllSessions().first().map {
-                                BackupClimbSession.fromClimbSession(it)
-                            },
-                    attempts =
-                            repository.getAllAttempts().first().map {
-                                BackupAttempt.fromAttempt(it)
-                            },
-                    deletedItems = repository.getDeletedItems()
-            )
-        }
-    }
-
-    private suspend fun importBackupToRepository(
-            backup: ClimbDataBackup,
-            imagePathMapping: Map<String, String>
-    ) {
-        val gyms = backup.gyms.map { it.toGym() }
-        val problems =
-                backup.problems.map { backupProblem ->
-                    val imagePaths = backupProblem.imagePaths
-                    val updatedImagePaths =
-                            imagePaths?.map { oldPath -> imagePathMapping[oldPath] ?: oldPath }
-                    backupProblem.copy(imagePaths = updatedImagePaths).toProblem()
-                }
-        val sessions = backup.sessions.map { it.toClimbSession() }
-        val attempts = backup.attempts.map { it.toAttempt() }
-
-        repository.resetAllData()
-
-        gyms.forEach { repository.insertGymWithoutSync(it) }
-        problems.forEach { repository.insertProblemWithoutSync(it) }
-        sessions.forEach { repository.insertSessionWithoutSync(it) }
-        attempts.forEach { repository.insertAttemptWithoutSync(it) }
-
-        repository.clearDeletedItems()
-    }
-
-    private suspend fun mergeDataSafely(serverBackup: ClimbDataBackup) {
-        Log.d(TAG, "Server data will overwrite local data. Performing full restore.")
-        val imagePathMapping = syncImagesFromServer(serverBackup)
-        importBackupToRepository(serverBackup, imagePathMapping)
-    }
-
-    private fun handleHttpError(code: Int): Nothing {
-        when (code) {
-            401 -> throw SyncException.Unauthorized
-            in 500..599 -> throw SyncException.ServerError(code)
-            else -> throw SyncException.InvalidResponse("HTTP error code: $code")
-        }
-    }
-
     suspend fun testConnection() {
-        if (!_isConfigured.value) {
-            _isConnected.value = false
-            _syncError.value = "Server URL or Auth Token is not set."
-            return
-        }
         _isTesting.value = true
         _syncError.value = null
-
-        val request =
-                Request.Builder()
-                        .url("$serverUrl/sync")
-                        .header("Authorization", "Bearer $authToken")
-                        .head()
-                        .build()
         try {
-            withContext(Dispatchers.IO) {
-                httpClient.newCall(request).execute().use { response ->
-                    _isConnected.value = response.isSuccessful || response.code == 405
-                }
-            }
-            if (!_isConnected.value) {
-                _syncError.value = "Connection failed. Check URL and token."
-            }
+            provider.testConnection()
         } catch (e: Exception) {
-            _isConnected.value = false
             _syncError.value = "Connection error: ${e.message}"
+            throw e
         } finally {
-            sharedPreferences.edit { putBoolean(Keys.IS_CONNECTED, _isConnected.value) }
             _isTesting.value = false
         }
     }
 
     fun triggerAutoSync() {
-        if (!_isConfigured.value || !_isConnected.value || !_isAutoSyncEnabled.value) {
+        if (!isConfiguredFlow.value || !isConnected.value || !_isAutoSyncEnabled.value) {
             return
         }
         if (_isSyncing.value) {
@@ -771,45 +137,25 @@ class SyncService(private val context: Context, private val repository: ClimbRep
         }
         syncJob?.cancel()
         syncJob =
-                serviceScope.launch {
-                    delay(syncDebounceDelay)
-                    try {
-                        syncWithServer()
-                    } catch (e: Exception) {
-                        Log.e(TAG, "Auto-sync failed", e)
-                    }
-                    if (pendingChanges) {
-                        pendingChanges = false
-                        triggerAutoSync()
-                    }
+            serviceScope.launch {
+                delay(syncDebounceDelay)
+                try {
+                    syncWithServer()
+                } catch (e: Exception) {
+                    AppLogger.e(TAG, e) { "Auto-sync failed" }
                 }
+                if (pendingChanges) {
+                    pendingChanges = false
+                    triggerAutoSync()
+                }
+            }
     }
 
     fun clearConfiguration() {
         syncJob?.cancel()
-        serverUrl = ""
-        authToken = ""
+        provider.disconnect()
         setAutoSyncEnabled(true)
         _lastSyncTime.value = null
-        _isConnected.value = false
         _syncError.value = null
-        sharedPreferences.edit { clear() }
-        updateConfiguredState()
     }
 }
-
-sealed class SyncException(message: String) : IOException(message), Serializable {
-    object NotConfigured :
-            SyncException("Sync is not configured. Please set server URL and auth token.")
-
-    object NotConnected : SyncException("Not connected to server. Please test connection first.")
-
-    object Unauthorized : SyncException("Unauthorized. Please check your auth token.")
-
-    object ImageNotFound : SyncException("Image not found on server")
-
-    data class ServerError(val code: Int) : SyncException("Server error: HTTP $code")
-    data class InvalidResponse(val details: String) :
-            SyncException("Invalid server response: $details")
-    data class NetworkError(val details: String) : SyncException("Network error: $details")
-}

android/app/src/main/java/com/atridad/ascently/service/SessionTrackingService.kt

@@ -6,41 +6,47 @@ import android.app.PendingIntent
 import android.app.Service
 import android.content.Context
 import android.content.Intent
+import android.os.Build
+import android.os.Bundle
 import android.os.IBinder
 import androidx.core.app.NotificationCompat
 import com.atridad.ascently.MainActivity
 import com.atridad.ascently.R
 import com.atridad.ascently.data.database.AscentlyDatabase
 import com.atridad.ascently.data.repository.ClimbRepository
+import com.atridad.ascently.utils.AppLogger
+import com.atridad.ascently.widget.ClimbStatsWidgetProvider
+import java.time.LocalDateTime
+import java.time.ZoneId
+import java.time.temporal.ChronoUnit
 import kotlinx.coroutines.*
 import kotlinx.coroutines.flow.firstOrNull
-import java.time.LocalDateTime
-import java.time.temporal.ChronoUnit
 import kotlinx.coroutines.runBlocking
 
 class SessionTrackingService : Service() {
-    
+
     private val serviceScope = CoroutineScope(Dispatchers.IO + SupervisorJob())
     private var notificationJob: Job? = null
     private var monitoringJob: Job? = null
-    
+
     private lateinit var repository: ClimbRepository
     private lateinit var notificationManager: NotificationManager
-    
+
     companion object {
+        private const val LOG_TAG = "SessionTrackingService"
         const val NOTIFICATION_ID = 1001
         const val CHANNEL_ID = "session_tracking_channel"
         const val ACTION_START_SESSION = "start_session"
         const val ACTION_STOP_SESSION = "stop_session"
         const val EXTRA_SESSION_ID = "session_id"
-        
+
         fun createStartIntent(context: Context, sessionId: String): Intent {
             return Intent(context, SessionTrackingService::class.java).apply {
                 action = ACTION_START_SESSION
                 putExtra(EXTRA_SESSION_ID, sessionId)
             }
         }
-        
+
         fun createStopIntent(context: Context, sessionId: String): Intent {
             return Intent(context, SessionTrackingService::class.java).apply {
                 action = ACTION_STOP_SESSION
@@ -48,17 +54,17 @@ class SessionTrackingService : Service() {
             }
         }
     }
-    
+
     override fun onCreate() {
         super.onCreate()
-        
+
         val database = AscentlyDatabase.getDatabase(this)
         repository = ClimbRepository(database, this)
         notificationManager = getSystemService(NOTIFICATION_SERVICE) as NotificationManager
-        
+
         createNotificationChannel()
     }
-    
+
     override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
         when (intent?.action) {
             ACTION_START_SESSION -> {
@@ -67,16 +73,24 @@ class SessionTrackingService : Service() {
                     startSessionTracking(sessionId)
                 }
             }
+
             ACTION_STOP_SESSION -> {
                 val sessionId = intent.getStringExtra(EXTRA_SESSION_ID)
                 serviceScope.launch {
                     try {
-                        val targetSession = when {
-                            sessionId != null -> repository.getSessionById(sessionId)
-                            else -> repository.getActiveSession()
-                        }
-                        if (targetSession != null && targetSession.status == com.atridad.ascently.data.model.SessionStatus.ACTIVE) {
-                            val completed = with(com.atridad.ascently.data.model.ClimbSession) { targetSession.complete() }
+                        val targetSession =
+                            when {
+                                sessionId != null -> repository.getSessionById(sessionId)
+                                else -> repository.getActiveSession()
+                            }
+                        if (targetSession != null &&
+                            targetSession.status ==
+                            com.atridad.ascently.data.model.SessionStatus.ACTIVE
+                        ) {
+                            val completed =
+                                with(com.atridad.ascently.data.model.ClimbSession) {
+                                    targetSession.complete()
+                                }
                             repository.updateSession(completed)
                         }
                     } finally {
@@ -90,61 +104,71 @@ class SessionTrackingService : Service() {
     }
 
     override fun onBind(intent: Intent?): IBinder? = null
-    
+
     private fun startSessionTracking(sessionId: String) {
         notificationJob?.cancel()
         monitoringJob?.cancel()
-        
+
         try {
             createAndShowNotification(sessionId)
+            // Update widget when session tracking starts
+            ClimbStatsWidgetProvider.updateAllWidgets(this)
         } catch (e: Exception) {
-            e.printStackTrace()
+            AppLogger.e(LOG_TAG, e) { "Failed to initialize session tracking notification" }
         }
-        
-        notificationJob = serviceScope.launch {
-            try {
-                if (!isNotificationActive()) {
-                    delay(1000L)
-                    createAndShowNotification(sessionId)
-                }
-                
-                while (isActive) {
-                    delay(5000L)
-                    updateNotification(sessionId)
-                }
-            } catch (e: Exception) {
-                e.printStackTrace()
-            }
-        }
-        
-        monitoringJob = serviceScope.launch {
-            try {
-                while (isActive) {
-                    delay(10000L)
-                    
+
+        notificationJob =
+            serviceScope.launch {
+                try {
                     if (!isNotificationActive()) {
+                        delay(1000L)
+                        createAndShowNotification(sessionId)
+                    }
+
+                    while (isActive) {
+                        delay(5000L)
                         updateNotification(sessionId)
                     }
-                    
-                    val session = repository.getSessionById(sessionId)
-                    if (session == null || session.status != com.atridad.ascently.data.model.SessionStatus.ACTIVE) {
-                        stopSessionTracking()
-                        break
-                    }
+                } catch (e: Exception) {
+                    AppLogger.e(LOG_TAG, e) { "Notification updater loop crashed" }
+                }
+            }
+
+        monitoringJob =
+            serviceScope.launch {
+                try {
+                    while (isActive) {
+                        delay(10000L)
+
+                        if (!isNotificationActive()) {
+                            updateNotification(sessionId)
+                        }
+
+                        val session = repository.getSessionById(sessionId)
+                        if (session == null ||
+                            session.status !=
+                            com.atridad.ascently.data.model.SessionStatus
+                                .ACTIVE
+                        ) {
+                            stopSessionTracking()
+                            break
+                        }
+                    }
+                } catch (e: Exception) {
+                    AppLogger.e(LOG_TAG, e) { "Session monitoring loop crashed" }
                 }
-            } catch (e: Exception) {
-                e.printStackTrace()
             }
-        }
     }
-    
+
     private fun stopSessionTracking() {
         notificationJob?.cancel()
         monitoringJob?.cancel()
         stopForeground(STOP_FOREGROUND_REMOVE)
         stopSelf()
+        // Update widget when session tracking stops
+        ClimbStatsWidgetProvider.updateAllWidgets(this)
     }
-    
+
     private fun isNotificationActive(): Boolean {
         return try {
             val activeNotifications = notificationManager.activeNotifications
@@ -153,97 +177,134 @@ class SessionTrackingService : Service() {
             false
         }
     }
-    
+
     private suspend fun updateNotification(sessionId: String) {
         try {
             createAndShowNotification(sessionId)
+            // Update widget when notification updates
+            ClimbStatsWidgetProvider.updateAllWidgets(this)
         } catch (e: Exception) {
-            e.printStackTrace()
+            AppLogger.e(LOG_TAG, e) { "Failed to update notification; retrying in 10s" }
 
             try {
                 delay(10000L)
                 createAndShowNotification(sessionId)
             } catch (retryException: Exception) {
-                retryException.printStackTrace()
+                AppLogger.e(LOG_TAG, retryException) { "Retrying notification update failed" }
                 stopSessionTracking()
             }
         }
     }
-    
+
     private fun createAndShowNotification(sessionId: String) {
         try {
-            val session = runBlocking {
-                repository.getSessionById(sessionId)
-            }
-            if (session == null || session.status != com.atridad.ascently.data.model.SessionStatus.ACTIVE) {
+            val session = runBlocking { repository.getSessionById(sessionId) }
+            if (session == null ||
+                session.status != com.atridad.ascently.data.model.SessionStatus.ACTIVE
+            ) {
                 stopSessionTracking()
                 return
             }
-            
-            val gym = runBlocking {
-                repository.getGymById(session.gymId)
-            }
-            
+
+            val gym = runBlocking { repository.getGymById(session.gymId) }
+
             val attempts = runBlocking {
                 repository.getAttemptsBySession(sessionId).firstOrNull() ?: emptyList()
             }
-            
-            val duration = session.startTime?.let { startTime ->
-                try {
-                    val start = LocalDateTime.parse(startTime)
-                    val now = LocalDateTime.now()
-                    val totalSeconds = ChronoUnit.SECONDS.between(start, now)
-                    val hours = totalSeconds / 3600
-                    val minutes = (totalSeconds % 3600) / 60
-                    val seconds = totalSeconds % 60
-                    
-                    when {
-                        hours > 0 -> "${hours}h ${minutes}m ${seconds}s"
-                        minutes > 0 -> "${minutes}m ${seconds}s"
-                        else -> "${totalSeconds}s"
+
+            val notificationBuilder =
+                NotificationCompat.Builder(this, CHANNEL_ID)
+                    .setSmallIcon(R.drawable.ic_mountains)
+                    .setOngoing(true)
+                    .setAutoCancel(false)
+                    .setPriority(NotificationCompat.PRIORITY_DEFAULT)
+                    .setCategory(NotificationCompat.CATEGORY_SERVICE)
+                    .setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
+                    .setContentIntent(createOpenAppIntent())
+                    .addAction(
+                        R.drawable.ic_mountains,
+                        "Open Session",
+                        createOpenAppIntent()
+                    )
+                    .addAction(
+                        android.R.drawable.ic_menu_close_clear_cancel,
+                        "End Session",
+                        createStopPendingIntent(sessionId)
+                    )
+
+            // Use Live Update
+            if (Build.VERSION.SDK_INT >= 36) {
+                val startTimeMillis =
+                    session.startTime?.let { startTime ->
+                        try {
+                            val start = LocalDateTime.parse(startTime)
+                            val zoneId = ZoneId.systemDefault()
+                            start.atZone(zoneId).toInstant().toEpochMilli()
+                        } catch (_: Exception) {
+                            System.currentTimeMillis()
+                        }
                     }
-                } catch (_: Exception) {
-                    "Active"
-                }
-            } ?: "Active"
-            
-            val notification = NotificationCompat.Builder(this, CHANNEL_ID)
-                .setContentTitle("Climbing Session Active")
-                .setContentText("${gym?.name ?: "Gym"} • $duration • ${attempts.size} attempts")
-                .setSmallIcon(R.drawable.ic_mountains)
-                .setOngoing(true)
-                .setAutoCancel(false)
-                .setPriority(NotificationCompat.PRIORITY_DEFAULT)
-                .setCategory(NotificationCompat.CATEGORY_SERVICE)
-                .setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
-                .setContentIntent(createOpenAppIntent())
-                .addAction(
-                    R.drawable.ic_mountains,
-                    "Open Session",
-                    createOpenAppIntent()
-                )
-                .addAction(
-                    android.R.drawable.ic_menu_close_clear_cancel,
-                    "End Session",
-                    createStopPendingIntent(sessionId)
-                )
-                .build()
-            
+                        ?: System.currentTimeMillis()
+
+                notificationBuilder
+                    .setContentTitle("Climbing Session Active")
+                    .setContentText(
+                        "${gym?.name ?: "Gym"} • ${attempts.size} attempts"
+                    )
+                    .setWhen(startTimeMillis)
+                    .setUsesChronometer(true)
+                    .setShowWhen(true)
+
+                val extras = Bundle()
+                extras.putBoolean("android.extra.REQUEST_PROMOTED_ONGOING", true)
+                notificationBuilder.setExtras(extras)
+            } else {
+                // Fallback for older versions
+                val duration =
+                    session.startTime?.let { startTime ->
+                        try {
+                            val start = LocalDateTime.parse(startTime)
+                            val now = LocalDateTime.now()
+                            val totalSeconds = ChronoUnit.SECONDS.between(start, now)
+                            val hours = totalSeconds / 3600
+                            val minutes = (totalSeconds % 3600) / 60
+                            val seconds = totalSeconds % 60
+
+                            when {
+                                hours > 0 -> "${hours}h ${minutes}m ${seconds}s"
+                                minutes > 0 -> "${minutes}m ${seconds}s"
+                                else -> "${totalSeconds}s"
+                            }
+                        } catch (_: Exception) {
+                            "Active"
+                        }
+                    }
+                        ?: "Active"
+
+                notificationBuilder
+                    .setContentTitle("Climbing Session Active")
+                    .setContentText(
+                        "${gym?.name ?: "Gym"} • $duration • ${attempts.size} attempts"
+                    )
+            }
+
+            val notification = notificationBuilder.build()
+
             startForeground(NOTIFICATION_ID, notification)
-            
+
             notificationManager.notify(NOTIFICATION_ID, notification)
-            
         } catch (e: Exception) {
-            e.printStackTrace()
+            AppLogger.e(LOG_TAG, e) { "Failed to build session tracking notification" }
             throw e
         }
     }
-    
+
     private fun createOpenAppIntent(): PendingIntent {
-        val intent = Intent(this, MainActivity::class.java).apply {
-            flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TOP
-            action = "OPEN_SESSION"
-        }
+        val intent =
+            Intent(this, MainActivity::class.java).apply {
+                flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TOP
+                action = "OPEN_SESSION"
+            }
         return PendingIntent.getActivity(
             this,
             0,
@@ -251,7 +312,7 @@ class SessionTrackingService : Service() {
             PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
         )
     }
-    
+
     private fun createStopPendingIntent(sessionId: String): PendingIntent {
         val intent = createStopIntent(this, sessionId)
         return PendingIntent.getService(
@@ -261,24 +322,26 @@ class SessionTrackingService : Service() {
             PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
         )
     }
-    
+
     private fun createNotificationChannel() {
-        val channel = NotificationChannel(
-            CHANNEL_ID,
-            "Session Tracking",
-            NotificationManager.IMPORTANCE_DEFAULT
-        ).apply {
-            description = "Shows active climbing session information"
-            setShowBadge(false)
-            lockscreenVisibility = NotificationCompat.VISIBILITY_PUBLIC
-            enableLights(false)
-            enableVibration(false)
-            setSound(null, null)
-        }
+        val channel =
+            NotificationChannel(
+                CHANNEL_ID,
+                "Session Tracking",
+                NotificationManager.IMPORTANCE_DEFAULT
+            )
+                .apply {
+                    description = "Shows active climbing session information"
+                    setShowBadge(false)
+                    lockscreenVisibility = NotificationCompat.VISIBILITY_PUBLIC
+                    enableLights(false)
+                    enableVibration(false)
+                    setSound(null, null)
+                }
 
         notificationManager.createNotificationChannel(channel)
     }
-    
+
     override fun onDestroy() {
         super.onDestroy()
         notificationJob?.cancel()

android/app/src/main/java/com/atridad/ascently/ui/AscentlyApp.kt

@@ -26,15 +26,16 @@ import com.atridad.ascently.ui.components.NotificationPermissionDialog
 import com.atridad.ascently.ui.screens.*
 import com.atridad.ascently.ui.viewmodel.ClimbViewModel
 import com.atridad.ascently.ui.viewmodel.ClimbViewModelFactory
+import com.atridad.ascently.utils.AppLogger
 import com.atridad.ascently.utils.AppShortcutManager
 import com.atridad.ascently.utils.NotificationPermissionUtils
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun AscentlyApp(
-        shortcutAction: String? = null,
-        lastUsedGymId: String? = null,
-        onShortcutActionProcessed: () -> Unit = {}
+    shortcutAction: String? = null,
+    lastUsedGymId: String? = null,
+    onShortcutActionProcessed: () -> Unit = {}
 ) {
     val navController = rememberNavController()
     val context = LocalContext.current
@@ -45,26 +46,26 @@ fun AscentlyApp(
     val repository = remember { ClimbRepository(database, context) }
     val syncService = remember { SyncService(context, repository) }
     val viewModel: ClimbViewModel =
-            viewModel(factory = ClimbViewModelFactory(repository, syncService, context))
+        viewModel(factory = ClimbViewModelFactory(repository, syncService, context))
 
     var showNotificationPermissionDialog by remember { mutableStateOf(false) }
     var hasCheckedNotificationPermission by remember { mutableStateOf(false) }
 
     val permissionLauncher =
-            rememberLauncherForActivityResult(
-                    contract = ActivityResultContracts.RequestPermission()
-            ) { isGranted: Boolean ->
-                if (!isGranted) {
-                    showNotificationPermissionDialog = false
-                }
+        rememberLauncherForActivityResult(
+            contract = ActivityResultContracts.RequestPermission()
+        ) { isGranted: Boolean ->
+            if (!isGranted) {
+                showNotificationPermissionDialog = false
             }
+        }
 
     LaunchedEffect(Unit) {
         if (!hasCheckedNotificationPermission) {
             hasCheckedNotificationPermission = true
 
             if (NotificationPermissionUtils.shouldRequestNotificationPermission() &&
-                            !NotificationPermissionUtils.isNotificationPermissionGranted(context)
+                !NotificationPermissionUtils.isNotificationPermissionGranted(context)
             ) {
                 showNotificationPermissionDialog = true
             }
@@ -86,10 +87,10 @@ fun AscentlyApp(
 
     LaunchedEffect(activeSession, gyms, lastUsedGym) {
         AppShortcutManager.updateShortcuts(
-                context = context,
-                hasActiveSession = activeSession != null,
-                hasGyms = gyms.isNotEmpty(),
-                lastUsedGym = if (activeSession == null && gyms.size > 1) lastUsedGym else null
+            context = context,
+            hasActiveSession = activeSession != null,
+            hasGyms = gyms.isNotEmpty(),
+            lastUsedGym = if (activeSession == null && gyms.size > 1) lastUsedGym else null
         )
     }
 
@@ -101,6 +102,7 @@ fun AscentlyApp(
                     launchSingleTop = true
                 }
             }
+
             AppShortcutManager.ACTION_END_SESSION -> {
                 navController.navigate(Screen.Sessions) {
                     popUpTo(0) { inclusive = true }
@@ -114,51 +116,36 @@ fun AscentlyApp(
 
     LaunchedEffect(shortcutAction, activeSession, gyms, lastUsedGym) {
         if (shortcutAction == AppShortcutManager.ACTION_START_SESSION && gyms.isNotEmpty()) {
-            android.util.Log.d(
-                    "AscentlyApp",
-                    "Processing shortcut action: activeSession=$activeSession, gyms.size=${gyms.size}, lastUsedGymId=$lastUsedGymId, lastUsedGym=${lastUsedGym?.name}"
-            )
+            AppLogger.d("AscentlyApp") { "Processing shortcut action: activeSession=$activeSession, gyms.size=${gyms.size}, lastUsedGymId=$lastUsedGymId, lastUsedGym=${lastUsedGym?.name}" }
 
             if (activeSession == null) {
                 if (NotificationPermissionUtils.shouldRequestNotificationPermission() &&
-                                !NotificationPermissionUtils.isNotificationPermissionGranted(
-                                        context
-                                )
+                    !NotificationPermissionUtils.isNotificationPermissionGranted(
+                        context
+                    )
                 ) {
-                    android.util.Log.d("AscentlyApp", "Showing notification permission dialog")
+                    AppLogger.d("AscentlyApp") { "Showing notification permission dialog" }
                     showNotificationPermissionDialog = true
                 } else {
                     if (gyms.size == 1) {
-                        android.util.Log.d(
-                                "AscentlyApp",
-                                "Starting session with single gym: ${gyms.first().name}"
-                        )
+                        AppLogger.d("AscentlyApp") { "Starting session with single gym: ${gyms.first().name}" }
                         viewModel.startSession(context, gyms.first().id)
                     } else {
                         val targetGym =
-                                lastUsedGymId?.let { gymId -> gyms.find { it.id == gymId } }
-                                        ?: lastUsedGym
+                            lastUsedGymId?.let { gymId -> gyms.find { it.id == gymId } }
+                                ?: lastUsedGym
 
                         if (targetGym != null) {
-                            android.util.Log.d(
-                                    "AscentlyApp",
-                                    "Starting session with target gym: ${targetGym.name}"
-                            )
+                            AppLogger.d("AscentlyApp") { "Starting session with target gym: ${targetGym.name}" }
                             viewModel.startSession(context, targetGym.id)
                         } else {
-                            android.util.Log.d(
-                                    "AscentlyApp",
-                                    "No target gym found, navigating to selection"
-                            )
+                            AppLogger.d("AscentlyApp") { "No target gym found, navigating to selection" }
                             navController.navigate(Screen.AddEditSession())
                         }
                     }
                 }
             } else {
-                android.util.Log.d(
-                        "AscentlyApp",
-                        "Active session already exists: ${activeSession?.id}"
-                )
+                AppLogger.d("AscentlyApp") { "Active session already exists: ${activeSession?.id}" }
             }
 
             onShortcutActionProcessed()
@@ -168,79 +155,79 @@ fun AscentlyApp(
     var fabConfig by remember { mutableStateOf<FabConfig?>(null) }
 
     Scaffold(
-            bottomBar = { AscentlyBottomNavigation(navController = navController) },
-            floatingActionButton = {
-                fabConfig?.let { config ->
-                    FloatingActionButton(
-                            onClick = config.onClick,
-                            containerColor = MaterialTheme.colorScheme.primary
-                    ) {
-                        Icon(
-                                imageVector = config.icon,
-                                contentDescription = config.contentDescription
-                        )
-                    }
+        bottomBar = { AscentlyBottomNavigation(navController = navController) },
+        floatingActionButton = {
+            fabConfig?.let { config ->
+                FloatingActionButton(
+                    onClick = config.onClick,
+                    containerColor = MaterialTheme.colorScheme.primary
+                ) {
+                    Icon(
+                        imageVector = config.icon,
+                        contentDescription = config.contentDescription
+                    )
                 }
             }
+        }
     ) { innerPadding ->
         NavHost(
-                navController = navController,
-                startDestination = Screen.Sessions,
-                modifier = Modifier.padding(innerPadding)
+            navController = navController,
+            startDestination = Screen.Sessions,
+            modifier = Modifier.padding(innerPadding)
         ) {
             composable<Screen.Sessions> {
                 LaunchedEffect(gyms, activeSession) {
                     fabConfig =
-                            if (gyms.isNotEmpty() && activeSession == null) {
-                                FabConfig(
-                                        icon = Icons.Default.PlayArrow,
-                                        contentDescription = "Start Session",
-                                        onClick = {
-                                            if (NotificationPermissionUtils
-                                                            .shouldRequestNotificationPermission() &&
-                                                            !NotificationPermissionUtils
-                                                                    .isNotificationPermissionGranted(
-                                                                            context
-                                                                    )
-                                            ) {
-                                                showNotificationPermissionDialog = true
-                                            } else {
-                                                navController.navigate(Screen.AddEditSession())
-                                            }
-                                        }
-                                )
-                            } else {
-                                null
-                            }
+                        if (gyms.isNotEmpty() && activeSession == null) {
+                            FabConfig(
+                                icon = Icons.Default.PlayArrow,
+                                contentDescription = "Start Session",
+                                onClick = {
+                                    if (NotificationPermissionUtils
+                                            .shouldRequestNotificationPermission() &&
+                                        !NotificationPermissionUtils
+                                            .isNotificationPermissionGranted(
+                                                context
+                                            )
+                                    ) {
+                                        showNotificationPermissionDialog = true
+                                    } else {
+                                        navController.navigate(Screen.AddEditSession())
+                                    }
+                                }
+                            )
+                        } else {
+                            null
+                        }
                 }
                 SessionsScreen(
-                        viewModel = viewModel,
-                        onNavigateToSessionDetail = { sessionId ->
-                            navController.navigate(Screen.SessionDetail(sessionId))
-                        }
+                    viewModel = viewModel,
+                    onNavigateToSessionDetail = { sessionId ->
+                        navController.navigate(Screen.SessionDetail(sessionId))
+                    }
                 )
             }
 
             composable<Screen.Problems> {
                 LaunchedEffect(gyms) {
                     fabConfig =
-                            if (gyms.isNotEmpty()) {
-                                FabConfig(
-                                        icon = Icons.Default.Add,
-                                        contentDescription = "Add Problem",
-                                        onClick = {
-                                            navController.navigate(Screen.AddEditProblem())
-                                        }
-                                )
-                            } else {
-                                null
-                            }
+                        if (gyms.isNotEmpty()) {
+                            FabConfig(
+                                icon = Icons.Default.Add,
+                                contentDescription = "Add Problem",
+                                onClick = {
+                                    navController.navigate(Screen.AddEditProblem())
+                                }
+                            )
+                        } else {
+                            null
+                        }
                 }
                 ProblemsScreen(
-                        viewModel = viewModel,
-                        onNavigateToProblemDetail = { problemId ->
-                            navController.navigate(Screen.ProblemDetail(problemId))
-                        }
+                    viewModel = viewModel,
+                    onNavigateToProblemDetail = { problemId ->
+                        navController.navigate(Screen.ProblemDetail(problemId))
+                    }
                 )
             }
 
@@ -252,17 +239,17 @@ fun AscentlyApp(
             composable<Screen.Gyms> {
                 LaunchedEffect(Unit) {
                     fabConfig =
-                            FabConfig(
-                                    icon = Icons.Default.Add,
-                                    contentDescription = "Add Gym",
-                                    onClick = { navController.navigate(Screen.AddEditGym()) }
-                            )
+                        FabConfig(
+                            icon = Icons.Default.Add,
+                            contentDescription = "Add Gym",
+                            onClick = { navController.navigate(Screen.AddEditGym()) }
+                        )
                 }
                 GymsScreen(
-                        viewModel = viewModel,
-                        onNavigateToGymDetail = { gymId ->
-                            navController.navigate(Screen.GymDetail(gymId))
-                        }
+                    viewModel = viewModel,
+                    onNavigateToGymDetail = { gymId ->
+                        navController.navigate(Screen.GymDetail(gymId))
+                    }
                 )
             }
 
@@ -275,12 +262,12 @@ fun AscentlyApp(
                 val args = backStackEntry.toRoute<Screen.SessionDetail>()
                 LaunchedEffect(Unit) { fabConfig = null }
                 SessionDetailScreen(
-                        sessionId = args.sessionId,
-                        viewModel = viewModel,
-                        onNavigateBack = { navController.popBackStack() },
-                        onNavigateToProblemDetail = { problemId ->
-                            navController.navigate(Screen.ProblemDetail(problemId))
-                        }
+                    sessionId = args.sessionId,
+                    viewModel = viewModel,
+                    onNavigateBack = { navController.popBackStack() },
+                    onNavigateToProblemDetail = { problemId ->
+                        navController.navigate(Screen.ProblemDetail(problemId))
+                    }
                 )
             }
 
@@ -288,12 +275,12 @@ fun AscentlyApp(
                 val args = backStackEntry.toRoute<Screen.ProblemDetail>()
                 LaunchedEffect(Unit) { fabConfig = null }
                 ProblemDetailScreen(
-                        problemId = args.problemId,
-                        viewModel = viewModel,
-                        onNavigateBack = { navController.popBackStack() },
-                        onNavigateToEdit = { problemId ->
-                            navController.navigate(Screen.AddEditProblem(problemId = problemId))
-                        }
+                    problemId = args.problemId,
+                    viewModel = viewModel,
+                    onNavigateBack = { navController.popBackStack() },
+                    onNavigateToEdit = { problemId ->
+                        navController.navigate(Screen.AddEditProblem(problemId = problemId))
+                    }
                 )
             }
 
@@ -301,18 +288,18 @@ fun AscentlyApp(
                 val args = backStackEntry.toRoute<Screen.GymDetail>()
                 LaunchedEffect(Unit) { fabConfig = null }
                 GymDetailScreen(
-                        gymId = args.gymId,
-                        viewModel = viewModel,
-                        onNavigateBack = { navController.popBackStack() },
-                        onNavigateToEdit = { gymId ->
-                            navController.navigate(Screen.AddEditGym(gymId = gymId))
-                        },
-                        onNavigateToSessionDetail = { sessionId ->
-                            navController.navigate(Screen.SessionDetail(sessionId))
-                        },
-                        onNavigateToProblemDetail = { problemId ->
-                            navController.navigate(Screen.ProblemDetail(problemId))
-                        }
+                    gymId = args.gymId,
+                    viewModel = viewModel,
+                    onNavigateBack = { navController.popBackStack() },
+                    onNavigateToEdit = { gymId ->
+                        navController.navigate(Screen.AddEditGym(gymId = gymId))
+                    },
+                    onNavigateToSessionDetail = { sessionId ->
+                        navController.navigate(Screen.SessionDetail(sessionId))
+                    },
+                    onNavigateToProblemDetail = { problemId ->
+                        navController.navigate(Screen.ProblemDetail(problemId))
+                    }
                 )
             }
 
@@ -320,9 +307,9 @@ fun AscentlyApp(
                 val args = backStackEntry.toRoute<Screen.AddEditGym>()
                 LaunchedEffect(Unit) { fabConfig = null }
                 AddEditGymScreen(
-                        gymId = args.gymId,
-                        viewModel = viewModel,
-                        onNavigateBack = { navController.popBackStack() }
+                    gymId = args.gymId,
+                    viewModel = viewModel,
+                    onNavigateBack = { navController.popBackStack() }
                 )
             }
 
@@ -330,10 +317,10 @@ fun AscentlyApp(
                 val args = backStackEntry.toRoute<Screen.AddEditProblem>()
                 LaunchedEffect(Unit) { fabConfig = null }
                 AddEditProblemScreen(
-                        problemId = args.problemId,
-                        gymId = args.gymId,
-                        viewModel = viewModel,
-                        onNavigateBack = { navController.popBackStack() }
+                    problemId = args.problemId,
+                    gymId = args.gymId,
+                    viewModel = viewModel,
+                    onNavigateBack = { navController.popBackStack() }
                 )
             }
 
@@ -341,22 +328,22 @@ fun AscentlyApp(
                 val args = backStackEntry.toRoute<Screen.AddEditSession>()
                 LaunchedEffect(Unit) { fabConfig = null }
                 AddEditSessionScreen(
-                        sessionId = args.sessionId,
-                        gymId = args.gymId,
-                        viewModel = viewModel,
-                        onNavigateBack = { navController.popBackStack() }
+                    sessionId = args.sessionId,
+                    gymId = args.gymId,
+                    viewModel = viewModel,
+                    onNavigateBack = { navController.popBackStack() }
                 )
             }
         }
 
         if (showNotificationPermissionDialog) {
             NotificationPermissionDialog(
-                    onDismiss = { showNotificationPermissionDialog = false },
-                    onRequestPermission = {
-                        permissionLauncher.launch(
-                                NotificationPermissionUtils.getNotificationPermissionString()
-                        )
-                    }
+                onDismiss = { showNotificationPermissionDialog = false },
+                onRequestPermission = {
+                    permissionLauncher.launch(
+                        NotificationPermissionUtils.getNotificationPermissionString()
+                    )
+                }
             )
         }
     }
@@ -370,34 +357,34 @@ fun AscentlyBottomNavigation(navController: NavHostController) {
     NavigationBar {
         bottomNavigationItems.forEach { item ->
             val isSelected =
-                    when (item.screen) {
-                        is Screen.Sessions -> currentRoute?.contains("Session") == true
-                        is Screen.Problems -> currentRoute?.contains("Problem") == true
-                        is Screen.Gyms -> currentRoute?.contains("Gym") == true
-                        is Screen.Analytics -> currentRoute?.contains("Analytics") == true
-                        is Screen.Settings -> currentRoute?.contains("Settings") == true
-                        else -> currentRoute?.contains(item.screen::class.simpleName ?: "") == true
-                    }
+                when (item.screen) {
+                    is Screen.Sessions -> currentRoute?.contains("Session") == true
+                    is Screen.Problems -> currentRoute?.contains("Problem") == true
+                    is Screen.Gyms -> currentRoute?.contains("Gym") == true
+                    is Screen.Analytics -> currentRoute?.contains("Analytics") == true
+                    is Screen.Settings -> currentRoute?.contains("Settings") == true
+                    else -> currentRoute?.contains(item.screen::class.simpleName ?: "") == true
+                }
 
             NavigationBarItem(
-                    icon = { Icon(item.icon, contentDescription = item.label) },
-                    label = { Text(item.label) },
-                    selected = isSelected,
-                    onClick = {
-                        navController.navigate(item.screen) {
-                            popUpTo(0) { inclusive = true }
-                            launchSingleTop = true
-                            // Don't restore state - always start fresh when switching tabs
-                            restoreState = false
-                        }
+                icon = { Icon(item.icon, contentDescription = item.label) },
+                label = { Text(item.label) },
+                selected = isSelected,
+                onClick = {
+                    navController.navigate(item.screen) {
+                        popUpTo(0) { inclusive = true }
+                        launchSingleTop = true
+                        // Don't restore state - always start fresh when switching tabs
+                        restoreState = false
                     }
+                }
             )
         }
     }
 }
 
 data class FabConfig(
-        val icon: androidx.compose.ui.graphics.vector.ImageVector,
-        val contentDescription: String,
-        val onClick: () -> Unit
+    val icon: androidx.compose.ui.graphics.vector.ImageVector,
+    val contentDescription: String,
+    val onClick: () -> Unit
 )

android/app/src/main/java/com/atridad/ascently/ui/screens/DetailScreens.kt

@@ -31,6 +31,7 @@ import androidx.compose.ui.window.Dialog
 import com.atridad.ascently.data.model.*
 import com.atridad.ascently.ui.components.FullscreenImageViewer
 import com.atridad.ascently.ui.components.ImageDisplaySection
+import com.atridad.ascently.ui.components.ImagePicker
 import com.atridad.ascently.ui.theme.CustomIcons
 import com.atridad.ascently.ui.viewmodel.ClimbViewModel
 import com.atridad.ascently.utils.DateFormatUtils
@@ -1489,6 +1490,7 @@ fun EnhancedAddAttemptDialog(
     // New problem creation state
     var newProblemName by remember { mutableStateOf("") }
     var newProblemGrade by remember { mutableStateOf("") }
+    var newProblemImagePaths by remember { mutableStateOf<List<String>>(emptyList()) }
     var selectedClimbType by remember { mutableStateOf(ClimbType.BOULDER) }
     var selectedDifficultySystem by remember {
         mutableStateOf(gym.difficultySystems.firstOrNull() ?: DifficultySystem.V_SCALE)
@@ -1690,7 +1692,14 @@ fun EnhancedAddAttemptDialog(
                                             color = MaterialTheme.colorScheme.onSurface
                                     )
 
-                                    IconButton(onClick = { showCreateProblem = false }) {
+                                    IconButton(
+                                            onClick = {
+                                                showCreateProblem = false
+                                                newProblemName = ""
+                                                newProblemGrade = ""
+                                                newProblemImagePaths = emptyList()
+                                            }
+                                    ) {
                                         Icon(
                                                 Icons.AutoMirrored.Filled.ArrowBack,
                                                 contentDescription = "Back",
@@ -1905,6 +1914,21 @@ fun EnhancedAddAttemptDialog(
                                         }
                                     }
                                 }
+
+                                // Photos Section
+                                Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
+                                    Text(
+                                            text = "Photos (Optional)",
+                                            style = MaterialTheme.typography.bodyLarge,
+                                            fontWeight = FontWeight.Medium,
+                                            color = MaterialTheme.colorScheme.onSurface
+                                    )
+                                    ImagePicker(
+                                            imageUris = newProblemImagePaths,
+                                            onImagesChanged = { newProblemImagePaths = it },
+                                            maxImages = 5
+                                    )
+                                }
                             }
                         }
                     }
@@ -2069,7 +2093,9 @@ fun EnhancedAddAttemptDialog(
                                                                                 null
                                                                             },
                                                                     climbType = selectedClimbType,
-                                                                    difficulty = difficulty
+                                                                    difficulty = difficulty,
+                                                                    imagePaths =
+                                                                            newProblemImagePaths
                                                             )
 
                                                     onProblemCreated(newProblem)
@@ -2087,6 +2113,12 @@ fun EnhancedAddAttemptDialog(
                                                                     notes = notes.ifBlank { null }
                                                             )
                                                     onAttemptAdded(attempt)
+
+                                                    // Reset form
+                                                    newProblemName = ""
+                                                    newProblemGrade = ""
+                                                    newProblemImagePaths = emptyList()
+                                                    showCreateProblem = false
                                                 }
                                             } else {
                                                 // Create attempt for selected problem

android/app/src/main/java/com/atridad/ascently/ui/screens/SessionsScreen.kt

@@ -5,8 +5,6 @@ import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.*
 import androidx.compose.foundation.lazy.LazyColumn
-import androidx.compose.foundation.lazy.grid.GridCells
-import androidx.compose.foundation.lazy.grid.LazyVerticalGrid
 import androidx.compose.foundation.lazy.items
 import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.shape.RoundedCornerShape
@@ -38,6 +36,7 @@ import java.time.YearMonth
 import java.time.format.DateTimeFormatter
 import java.time.format.TextStyle
 import java.util.Locale
+import androidx.core.content.edit
 
 enum class ViewMode {
     LIST,
@@ -60,7 +59,7 @@ fun SessionsScreen(viewModel: ClimbViewModel, onNavigateToSessionDetail: (String
         mutableStateOf(if (savedViewMode == "CALENDAR") ViewMode.CALENDAR else ViewMode.LIST)
     }
     var selectedMonth by remember { mutableStateOf(YearMonth.now()) }
-    var selectedDate by remember { mutableStateOf<LocalDate?>(null) }
+    var selectedDate by remember { mutableStateOf<LocalDate?>(LocalDate.now()) }
 
     val completedSessions = sessions.filter { it.status == SessionStatus.COMPLETED }
     val activeSessionGym = activeSession?.let { session -> gyms.find { it.id == session.gymId } }
@@ -89,7 +88,7 @@ fun SessionsScreen(viewModel: ClimbViewModel, onNavigateToSessionDetail: (String
                         viewMode =
                                 if (viewMode == ViewMode.LIST) ViewMode.CALENDAR else ViewMode.LIST
                         selectedDate = null
-                        sharedPreferences.edit().putString("view_mode", viewMode.name).apply()
+                        sharedPreferences.edit { putString("view_mode", viewMode.name) }
                     }
             ) {
                 Icon(
@@ -147,16 +146,11 @@ fun SessionsScreen(viewModel: ClimbViewModel, onNavigateToSessionDetail: (String
                     CalendarView(
                             sessions = completedSessions,
                             gyms = gyms,
-                            activeSession = activeSession,
-                            activeSessionGym = activeSessionGym,
-                            selectedMonth = selectedMonth,
+                        selectedMonth = selectedMonth,
                             onMonthChange = { selectedMonth = it },
                             selectedDate = selectedDate,
                             onDateSelected = { selectedDate = it },
-                            onNavigateToSessionDetail = onNavigateToSessionDetail,
-                            onEndSession = {
-                                activeSession?.let { viewModel.endSession(context, it.id) }
-                            }
+                            onNavigateToSessionDetail = onNavigateToSessionDetail
                     )
                 }
             }
@@ -315,14 +309,11 @@ fun EmptyStateMessage(
 fun CalendarView(
         sessions: List<ClimbSession>,
         gyms: List<com.atridad.ascently.data.model.Gym>,
-        activeSession: ClimbSession?,
-        activeSessionGym: com.atridad.ascently.data.model.Gym?,
         selectedMonth: YearMonth,
         onMonthChange: (YearMonth) -> Unit,
         selectedDate: LocalDate?,
         onDateSelected: (LocalDate?) -> Unit,
-        onNavigateToSessionDetail: (String) -> Unit,
-        onEndSession: () -> Unit
+        onNavigateToSessionDetail: (String) -> Unit
 ) {
     val sessionsByDate =
             remember(sessions) {
@@ -331,129 +322,126 @@ fun CalendarView(
                         java.time.Instant.parse(it.date)
                                 .atZone(java.time.ZoneId.systemDefault())
                                 .toLocalDate()
-                    } catch (e: Exception) {
+                    } catch (_: Exception) {
                         LocalDate.parse(it.date, DateTimeFormatter.ISO_LOCAL_DATE)
                     }
                 }
             }
 
-    Column(modifier = Modifier.fillMaxSize()) {
-        if (activeSession != null && activeSessionGym != null) {
-            Column(modifier = Modifier.padding(horizontal = 16.dp)) {
-                ActiveSessionBanner(
-                        activeSession = activeSession,
-                        gym = activeSessionGym,
-                        onSessionClick = { onNavigateToSessionDetail(activeSession.id) },
-                        onEndSession = onEndSession
-                )
+    val firstDayOfMonth = selectedMonth.atDay(1)
+    val daysInMonth = selectedMonth.lengthOfMonth()
+    val firstDayOfWeek = firstDayOfMonth.dayOfWeek.value % 7
+    val totalCells =
+            ((firstDayOfWeek + daysInMonth) / 7.0).let {
+                if (it == it.toInt().toDouble()) it.toInt() * 7 else (it.toInt() + 1) * 7
             }
+    val numRows = totalCells / 7
+
+    LazyColumn(modifier = Modifier.fillMaxSize()) {
+        item {
+            Card(
+                    modifier = Modifier.fillMaxWidth(),
+                    colors =
+                            CardDefaults.cardColors(
+                                    containerColor = MaterialTheme.colorScheme.surfaceVariant
+                            )
+            ) {
+                Column(
+                        modifier =
+                                Modifier.fillMaxWidth().padding(horizontal = 8.dp, vertical = 12.dp),
+                        horizontalAlignment = Alignment.CenterHorizontally
+                ) {
+                    Row(
+                            modifier = Modifier.fillMaxWidth(),
+                            horizontalArrangement = Arrangement.SpaceBetween,
+                            verticalAlignment = Alignment.CenterVertically
+                    ) {
+                        IconButton(onClick = { onMonthChange(selectedMonth.minusMonths(1)) }) {
+                            Text("‹", style = MaterialTheme.typography.headlineMedium)
+                        }
+
+                        Text(
+                                text =
+                                        "${selectedMonth.month.getDisplayName(TextStyle.FULL, Locale.getDefault())} ${selectedMonth.year}",
+                                style = MaterialTheme.typography.titleMedium,
+                                fontWeight = FontWeight.Bold
+                        )
+
+                        IconButton(onClick = { onMonthChange(selectedMonth.plusMonths(1)) }) {
+                            Text("›", style = MaterialTheme.typography.headlineMedium)
+                        }
+                    }
+
+                    Spacer(modifier = Modifier.height(8.dp))
+
+                    Button(
+                            onClick = {
+                                val today = LocalDate.now()
+                                onMonthChange(YearMonth.from(today))
+                                onDateSelected(today)
+                            },
+                            shape = RoundedCornerShape(50),
+                            colors =
+                                    ButtonDefaults.buttonColors(
+                                            containerColor = MaterialTheme.colorScheme.primary
+                                    ),
+                            contentPadding = PaddingValues(horizontal = 20.dp, vertical = 8.dp)
+                    ) {
+                        Text(
+                                text = "Today",
+                                style = MaterialTheme.typography.labelLarge,
+                                fontWeight = FontWeight.SemiBold
+                        )
+                    }
+                }
+            }
+
+            Spacer(modifier = Modifier.height(16.dp))
+
+            Row(modifier = Modifier.fillMaxWidth()) {
+                listOf("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat").forEach { day ->
+                    Text(
+                            text = day,
+                            modifier = Modifier.weight(1f),
+                            textAlign = TextAlign.Center,
+                            style = MaterialTheme.typography.labelSmall,
+                            color = MaterialTheme.colorScheme.onSurfaceVariant,
+                            fontWeight = FontWeight.Bold
+                    )
+                }
+            }
+
             Spacer(modifier = Modifier.height(8.dp))
         }
 
-        Card(
-                modifier = Modifier.fillMaxWidth(),
-                colors =
-                        CardDefaults.cardColors(
-                                containerColor = MaterialTheme.colorScheme.surfaceVariant
-                        )
-        ) {
-            Column(
-                    modifier = Modifier.fillMaxWidth().padding(horizontal = 8.dp, vertical = 12.dp),
-                    horizontalAlignment = Alignment.CenterHorizontally
-            ) {
-                Row(
-                        modifier = Modifier.fillMaxWidth(),
-                        horizontalArrangement = Arrangement.SpaceBetween,
-                        verticalAlignment = Alignment.CenterVertically
-                ) {
-                    IconButton(onClick = { onMonthChange(selectedMonth.minusMonths(1)) }) {
-                        Text("‹", style = MaterialTheme.typography.headlineMedium)
+        items(numRows) { rowIndex ->
+            Row(modifier = Modifier.fillMaxWidth()) {
+                for (colIndex in 0 until 7) {
+                    val index = rowIndex * 7 + colIndex
+                    val dayNumber = index - firstDayOfWeek + 1
+
+                    Box(modifier = Modifier.weight(1f)) {
+                        if (dayNumber in 1..daysInMonth) {
+                            val date = selectedMonth.atDay(dayNumber)
+                            val sessionsOnDate = sessionsByDate[date] ?: emptyList()
+                            val isSelected = date == selectedDate
+                            val isToday = date == LocalDate.now()
+
+                            CalendarDay(
+                                    day = dayNumber,
+                                    hasSession = sessionsOnDate.isNotEmpty(),
+                                    isSelected = isSelected,
+                                    isToday = isToday,
+                                    onClick = {
+                                        if (sessionsOnDate.isNotEmpty()) {
+                                            onDateSelected(if (isSelected) null else date)
+                                        }
+                                    }
+                            )
+                        } else {
+                            Spacer(modifier = Modifier.aspectRatio(1f))
+                        }
                     }
-
-                    Text(
-                            text =
-                                    "${selectedMonth.month.getDisplayName(TextStyle.FULL, Locale.getDefault())} ${selectedMonth.year}",
-                            style = MaterialTheme.typography.titleMedium,
-                            fontWeight = FontWeight.Bold
-                    )
-
-                    IconButton(onClick = { onMonthChange(selectedMonth.plusMonths(1)) }) {
-                        Text("›", style = MaterialTheme.typography.headlineMedium)
-                    }
-                }
-
-                Spacer(modifier = Modifier.height(8.dp))
-
-                Button(
-                        onClick = {
-                            val today = LocalDate.now()
-                            onMonthChange(YearMonth.from(today))
-                            onDateSelected(today)
-                        },
-                        shape = RoundedCornerShape(50),
-                        colors =
-                                ButtonDefaults.buttonColors(
-                                        containerColor = MaterialTheme.colorScheme.primary
-                                ),
-                        contentPadding = PaddingValues(horizontal = 20.dp, vertical = 8.dp)
-                ) {
-                    Text(
-                            text = "Today",
-                            style = MaterialTheme.typography.labelLarge,
-                            fontWeight = FontWeight.SemiBold
-                    )
-                }
-            }
-        }
-
-        Spacer(modifier = Modifier.height(16.dp))
-
-        Row(modifier = Modifier.fillMaxWidth()) {
-            listOf("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat").forEach { day ->
-                Text(
-                        text = day,
-                        modifier = Modifier.weight(1f),
-                        textAlign = TextAlign.Center,
-                        style = MaterialTheme.typography.labelSmall,
-                        color = MaterialTheme.colorScheme.onSurfaceVariant,
-                        fontWeight = FontWeight.Bold
-                )
-            }
-        }
-
-        Spacer(modifier = Modifier.height(8.dp))
-
-        val firstDayOfMonth = selectedMonth.atDay(1)
-        val daysInMonth = selectedMonth.lengthOfMonth()
-        val firstDayOfWeek = firstDayOfMonth.dayOfWeek.value % 7
-        val totalCells =
-                ((firstDayOfWeek + daysInMonth) / 7.0).let {
-                    if (it == it.toInt().toDouble()) it.toInt() * 7 else (it.toInt() + 1) * 7
-                }
-
-        LazyVerticalGrid(columns = GridCells.Fixed(7), modifier = Modifier.fillMaxWidth()) {
-            items(totalCells) { index ->
-                val dayNumber = index - firstDayOfWeek + 1
-
-                if (dayNumber in 1..daysInMonth) {
-                    val date = selectedMonth.atDay(dayNumber)
-                    val sessionsOnDate = sessionsByDate[date] ?: emptyList()
-                    val isSelected = date == selectedDate
-                    val isToday = date == LocalDate.now()
-
-                    CalendarDay(
-                            day = dayNumber,
-                            hasSession = sessionsOnDate.isNotEmpty(),
-                            isSelected = isSelected,
-                            isToday = isToday,
-                            onClick = {
-                                if (sessionsOnDate.isNotEmpty()) {
-                                    onDateSelected(if (isSelected) null else date)
-                                }
-                            }
-                    )
-                } else {
-                    Spacer(modifier = Modifier.aspectRatio(1f))
                 }
             }
         }
@@ -461,26 +449,28 @@ fun CalendarView(
         if (selectedDate != null) {
             val sessionsOnSelectedDate = sessionsByDate[selectedDate] ?: emptyList()
 
-            Spacer(modifier = Modifier.height(16.dp))
+            item {
+                Spacer(modifier = Modifier.height(16.dp))
 
-            Text(
-                    text =
-                            "Sessions on ${selectedDate.format(DateTimeFormatter.ofPattern("MMMM d, yyyy"))}",
-                    style = MaterialTheme.typography.titleSmall,
-                    fontWeight = FontWeight.Bold,
-                    modifier = Modifier.padding(vertical = 8.dp)
-            )
-
-            LazyColumn(modifier = Modifier.fillMaxWidth()) {
-                items(sessionsOnSelectedDate) { session ->
-                    SessionCard(
-                            session = session,
-                            gymName = gyms.find { it.id == session.gymId }?.name ?: "Unknown Gym",
-                            onClick = { onNavigateToSessionDetail(session.id) }
-                    )
-                    Spacer(modifier = Modifier.height(8.dp))
-                }
+                Text(
+                        text =
+                                "Sessions on ${selectedDate.format(DateTimeFormatter.ofPattern("MMMM d, yyyy"))}",
+                        style = MaterialTheme.typography.titleSmall,
+                        fontWeight = FontWeight.Bold,
+                        modifier = Modifier.padding(vertical = 8.dp)
+                )
             }
+
+            items(sessionsOnSelectedDate) { session ->
+                SessionCard(
+                        session = session,
+                        gymName = gyms.find { it.id == session.gymId }?.name ?: "Unknown Gym",
+                        onClick = { onNavigateToSessionDetail(session.id) }
+                )
+                Spacer(modifier = Modifier.height(8.dp))
+            }
+
+            item { Spacer(modifier = Modifier.height(16.dp)) }
         }
     }
 }

android/app/src/main/java/com/atridad/ascently/ui/screens/SettingsScreen.kt

@@ -216,9 +216,7 @@ fun SettingsScreen(viewModel: ClimbViewModel) {
                                             // Manual Sync Button
                                             TextButton(
                                                     onClick = {
-                                                        coroutineScope.launch {
-                                                            viewModel.performManualSync()
-                                                        }
+                                                        viewModel.performManualSync()
                                                     },
                                                     enabled = isConnected && !isSyncing
                                             ) {
@@ -583,41 +581,6 @@ fun SettingsScreen(viewModel: ClimbViewModel) {
 
                     Spacer(modifier = Modifier.height(12.dp))
 
-                    Card(
-                            shape = RoundedCornerShape(12.dp),
-                            colors =
-                                    CardDefaults.cardColors(
-                                            containerColor =
-                                                    MaterialTheme.colorScheme.surfaceVariant.copy(
-                                                            alpha = 0.3f
-                                                    )
-                                    )
-                    ) {
-                        ListItem(
-                                headlineContent = {
-                                    Row(
-                                            verticalAlignment = Alignment.CenterVertically,
-                                            horizontalArrangement = Arrangement.spacedBy(8.dp)
-                                    ) {
-                                        Icon(
-                                                painter =
-                                                        painterResource(
-                                                                id = R.drawable.ic_mountains
-                                                        ),
-                                                contentDescription = "Ascently Logo",
-                                                modifier = Modifier.size(24.dp),
-                                                tint = MaterialTheme.colorScheme.primary
-                                        )
-                                        Text("Ascently")
-                                    }
-                                },
-                                supportingContent = { Text("Track your climbing progress") },
-                                leadingContent = {}
-                        )
-                    }
-
-                    Spacer(modifier = Modifier.height(8.dp))
-
                     Card(
                             shape = RoundedCornerShape(12.dp),
                             colors =

android/app/src/main/java/com/atridad/ascently/ui/viewmodel/ClimbViewModel.kt

@@ -8,6 +8,7 @@ import com.atridad.ascently.data.model.*
 import com.atridad.ascently.data.repository.ClimbRepository
 import com.atridad.ascently.data.sync.SyncService
 import com.atridad.ascently.service.SessionTrackingService
+import com.atridad.ascently.utils.AppLogger
 import com.atridad.ascently.utils.ImageUtils
 import com.atridad.ascently.widget.ClimbStatsWidgetProvider
 import java.io.File
@@ -15,9 +16,9 @@ import kotlinx.coroutines.flow.*
 import kotlinx.coroutines.launch
 
 class ClimbViewModel(
-        private val repository: ClimbRepository,
-        val syncService: SyncService,
-        private val context: Context
+    private val repository: ClimbRepository,
+    val syncService: SyncService,
+    private val context: Context
 ) : ViewModel() {
 
     // Health Connect manager
@@ -29,49 +30,49 @@ class ClimbViewModel(
 
     // Data flows
     val gyms =
-            repository
-                    .getAllGyms()
-                    .stateIn(
-                            scope = viewModelScope,
-                            started = SharingStarted.WhileSubscribed(),
-                            initialValue = emptyList()
-                    )
+        repository
+            .getAllGyms()
+            .stateIn(
+                scope = viewModelScope,
+                started = SharingStarted.WhileSubscribed(),
+                initialValue = emptyList()
+            )
 
     val problems =
-            repository
-                    .getAllProblems()
-                    .stateIn(
-                            scope = viewModelScope,
-                            started = SharingStarted.WhileSubscribed(),
-                            initialValue = emptyList()
-                    )
+        repository
+            .getAllProblems()
+            .stateIn(
+                scope = viewModelScope,
+                started = SharingStarted.WhileSubscribed(),
+                initialValue = emptyList()
+            )
 
     val sessions =
-            repository
-                    .getAllSessions()
-                    .stateIn(
-                            scope = viewModelScope,
-                            started = SharingStarted.WhileSubscribed(),
-                            initialValue = emptyList()
-                    )
+        repository
+            .getAllSessions()
+            .stateIn(
+                scope = viewModelScope,
+                started = SharingStarted.WhileSubscribed(),
+                initialValue = emptyList()
+            )
 
     val activeSession =
-            repository
-                    .getActiveSessionFlow()
-                    .stateIn(
-                            scope = viewModelScope,
-                            started = SharingStarted.WhileSubscribed(),
-                            initialValue = null
-                    )
+        repository
+            .getActiveSessionFlow()
+            .stateIn(
+                scope = viewModelScope,
+                started = SharingStarted.WhileSubscribed(),
+                initialValue = null
+            )
 
     val attempts =
-            repository
-                    .getAllAttempts()
-                    .stateIn(
-                            scope = viewModelScope,
-                            started = SharingStarted.WhileSubscribed(),
-                            initialValue = emptyList()
-                    )
+        repository
+            .getAllAttempts()
+            .stateIn(
+                scope = viewModelScope,
+                started = SharingStarted.WhileSubscribed(),
+                initialValue = emptyList()
+            )
 
     // Gym operations
     fun addGym(gym: Gym, updateWidgets: Boolean = true) {
@@ -124,7 +125,7 @@ class ClimbViewModel(
         problem.imagePaths.forEachIndexed { index, tempPath ->
             if (tempPath.startsWith("temp_")) {
                 val finalPath =
-                        ImageUtils.renameTemporaryImage(context, tempPath, problem.id, index)
+                    ImageUtils.renameTemporaryImage(context, tempPath, problem.id, index)
                 finalImagePaths.add(finalPath ?: tempPath)
             } else {
                 finalImagePaths.add(tempPath)
@@ -176,23 +177,23 @@ class ClimbViewModel(
 
             val allProblems = repository.getAllProblems().first()
             val updatedProblems =
-                    allProblems.map { problem ->
-                        if (problem.imagePaths.isNotEmpty()) {
-                            problem.copy(imagePaths = emptyList())
-                        } else {
-                            problem
-                        }
+                allProblems.map { problem ->
+                    if (problem.imagePaths.isNotEmpty()) {
+                        problem.copy(imagePaths = emptyList())
+                    } else {
+                        problem
                     }
+                }
 
             for (updatedProblem in updatedProblems) {
                 if (updatedProblem.imagePaths !=
-                                allProblems.find { it.id == updatedProblem.id }?.imagePaths
+                    allProblems.find { it.id == updatedProblem.id }?.imagePaths
                 ) {
                     repository.insertProblemWithoutSync(updatedProblem)
                 }
             }
 
-            println("Deleted $deletedCount image files and cleared image references")
+            AppLogger.i("ClimbViewModel") { "Deleted $deletedCount image files and cleared image references" }
         }
     }
 
@@ -225,7 +226,7 @@ class ClimbViewModel(
     }
 
     fun getSessionsByGym(gymId: String): Flow<List<ClimbSession>> =
-            repository.getSessionsByGym(gymId)
+        repository.getSessionsByGym(gymId)
 
     // Get last used gym for shortcut functionality
     suspend fun getLastUsedGym(): Gym? = repository.getLastUsedGym()
@@ -233,41 +234,35 @@ class ClimbViewModel(
     // Active session management
     fun startSession(context: Context, gymId: String, notes: String? = null) {
         viewModelScope.launch {
-            android.util.Log.d("ClimbViewModel", "startSession called with gymId: $gymId")
+            AppLogger.d("ClimbViewModel") { "startSession called with gymId: $gymId" }
 
             if (!com.atridad.ascently.utils.NotificationPermissionUtils
-                            .isNotificationPermissionGranted(context)
+                    .isNotificationPermissionGranted(context)
             ) {
-                android.util.Log.d("ClimbViewModel", "Notification permission not granted")
+                AppLogger.d("ClimbViewModel") { "Notification permission not granted" }
                 _uiState.value =
-                        _uiState.value.copy(
-                                error =
-                                        "Notification permission is required to track your climbing session. Please enable notifications in settings."
-                        )
+                    _uiState.value.copy(
+                        error =
+                            "Notification permission is required to track your climbing session. Please enable notifications in settings."
+                    )
                 return@launch
             }
 
             val existingActive = repository.getActiveSession()
             if (existingActive != null) {
-                android.util.Log.d(
-                        "ClimbViewModel",
-                        "Active session already exists: ${existingActive.id}"
-                )
+                AppLogger.d("ClimbViewModel") { "Active session already exists: ${existingActive.id}" }
                 _uiState.value =
-                        _uiState.value.copy(
-                                error = "There's already an active session. Please end it first."
-                        )
+                    _uiState.value.copy(
+                        error = "There's already an active session. Please end it first."
+                    )
                 return@launch
             }
 
-            android.util.Log.d("ClimbViewModel", "Creating new session")
+            AppLogger.d("ClimbViewModel") { "Creating new session" }
             val newSession = ClimbSession.create(gymId = gymId, notes = notes)
             repository.insertSession(newSession)
 
-            android.util.Log.d(
-                    "ClimbViewModel",
-                    "Starting tracking service for session: ${newSession.id}"
-            )
+            AppLogger.d("ClimbViewModel") { "Starting tracking service for session: ${newSession.id}" }
             // Start the tracking service
             val serviceIntent = SessionTrackingService.createStartIntent(context, newSession.id)
             context.startForegroundService(serviceIntent)
@@ -281,13 +276,13 @@ class ClimbViewModel(
     fun endSession(context: Context, sessionId: String) {
         viewModelScope.launch {
             if (!com.atridad.ascently.utils.NotificationPermissionUtils
-                            .isNotificationPermissionGranted(context)
+                    .isNotificationPermissionGranted(context)
             ) {
                 _uiState.value =
-                        _uiState.value.copy(
-                                error =
-                                        "Notification permission is required to manage your climbing session. Please enable notifications in settings."
-                        )
+                    _uiState.value.copy(
+                        error =
+                            "Notification permission is required to manage your climbing session. Please enable notifications in settings."
+                    )
                 return@launch
             }
 
@@ -313,7 +308,7 @@ class ClimbViewModel(
             val activeSession = repository.getActiveSession()
             if (activeSession != null && activeSession.status == SessionStatus.ACTIVE) {
                 val serviceIntent =
-                        SessionTrackingService.createStartIntent(context, activeSession.id)
+                    SessionTrackingService.createStartIntent(context, activeSession.id)
                 context.startForegroundService(serviceIntent)
             }
         }
@@ -348,32 +343,32 @@ class ClimbViewModel(
     }
 
     fun getAttemptsBySession(sessionId: String): Flow<List<Attempt>> =
-            repository.getAttemptsBySession(sessionId)
+        repository.getAttemptsBySession(sessionId)
 
     fun getAttemptsByProblem(problemId: String): Flow<List<Attempt>> =
-            repository.getAttemptsByProblem(problemId)
+        repository.getAttemptsByProblem(problemId)
 
     fun exportDataToZipUri(context: Context, uri: android.net.Uri) {
         viewModelScope.launch {
             try {
                 _uiState.value =
-                        _uiState.value.copy(
-                                isLoading = true,
-                                message = "Creating ZIP file with images..."
-                        )
+                    _uiState.value.copy(
+                        isLoading = true,
+                        message = "Creating ZIP file with images..."
+                    )
                 repository.exportAllDataToZipUri(context, uri)
                 _uiState.value =
-                        _uiState.value.copy(
-                                isLoading = false,
-                                message =
-                                        "Export complete! Your climbing data and images have been saved."
-                        )
+                    _uiState.value.copy(
+                        isLoading = false,
+                        message =
+                            "Export complete! Your climbing data and images have been saved."
+                    )
             } catch (e: Exception) {
                 _uiState.value =
-                        _uiState.value.copy(
-                                isLoading = false,
-                                error = "Export failed: ${e.message}"
-                        )
+                    _uiState.value.copy(
+                        isLoading = false,
+                        error = "Export failed: ${e.message}"
+                    )
             }
         }
     }
@@ -385,23 +380,23 @@ class ClimbViewModel(
 
                 if (!file.name.lowercase().endsWith(".zip")) {
                     throw Exception(
-                            "Only ZIP files are supported for import. Please use a ZIP file exported from Ascently."
+                        "Only ZIP files are supported for import. Please use a ZIP file exported from Ascently."
                     )
                 }
 
                 repository.importDataFromZip(file)
 
                 _uiState.value =
-                        _uiState.value.copy(
-                                isLoading = false,
-                                message = "Data imported successfully from ${file.name}"
-                        )
+                    _uiState.value.copy(
+                        isLoading = false,
+                        message = "Data imported successfully from ${file.name}"
+                    )
             } catch (e: Exception) {
                 _uiState.value =
-                        _uiState.value.copy(
-                                isLoading = false,
-                                error = "Import failed: ${e.message}"
-                        )
+                    _uiState.value.copy(
+                        isLoading = false,
+                        error = "Import failed: ${e.message}"
+                    )
             }
         }
     }
@@ -416,11 +411,13 @@ class ClimbViewModel(
     }
 
     // Sync-related methods
-    suspend fun performManualSync() {
-        try {
-            syncService.syncWithServer()
-        } catch (e: Exception) {
-            setError("Sync failed: ${e.message}")
+    fun performManualSync() {
+        viewModelScope.launch {
+            try {
+                syncService.syncWithServer()
+            } catch (e: Exception) {
+                setError("Sync failed: ${e.message}")
+            }
         }
     }
 
@@ -448,13 +445,13 @@ class ClimbViewModel(
                 repository.resetAllData()
 
                 _uiState.value =
-                        _uiState.value.copy(
-                                isLoading = false,
-                                message = "All data has been reset successfully"
-                        )
+                    _uiState.value.copy(
+                        isLoading = false,
+                        message = "All data has been reset successfully"
+                    )
             } catch (e: Exception) {
                 _uiState.value =
-                        _uiState.value.copy(isLoading = false, error = "Reset failed: ${e.message}")
+                    _uiState.value.copy(isLoading = false, error = "Reset failed: ${e.message}")
             }
         }
     }
@@ -469,23 +466,20 @@ class ClimbViewModel(
                 val attemptCount = attempts.size
 
                 val result =
-                        healthConnectManager.autoSyncCompletedSession(
-                                session,
-                                gymName,
-                                attemptCount
-                        )
+                    healthConnectManager.autoSyncCompletedSession(
+                        session,
+                        gymName,
+                        attemptCount
+                    )
 
                 result.onFailure { error ->
                     if (healthConnectManager.isReadySync()) {
-                        android.util.Log.w(
-                                "ClimbViewModel",
-                                "Health Connect sync failed: ${error.message}"
-                        )
+                        AppLogger.w("ClimbViewModel") { "Health Connect sync failed: ${error.message}" }
                     }
                 }
             } catch (e: Exception) {
                 if (healthConnectManager.isReadySync()) {
-                    android.util.Log.w("ClimbViewModel", "Health Connect sync error: ${e.message}")
+                    AppLogger.w("ClimbViewModel") { "Health Connect sync error: ${e.message}" }
                 }
             }
         }
@@ -493,7 +487,7 @@ class ClimbViewModel(
 }
 
 data class ClimbUiState(
-        val isLoading: Boolean = false,
-        val message: String? = null,
-        val error: String? = null
+    val isLoading: Boolean = false,
+    val message: String? = null,
+    val error: String? = null
 )

android/app/src/main/java/com/atridad/ascently/utils/AppLogger.kt

@@ -0,0 +1,48 @@
+package com.atridad.ascently.utils
+
+import android.util.Log
+import com.atridad.ascently.BuildConfig
+
+object AppLogger {
+
+    private const val DEFAULT_TAG = "Ascently"
+
+    enum class Level(val androidLevel: Int) {
+        DEBUG(Log.DEBUG),
+        INFO(Log.INFO),
+        WARN(Log.WARN),
+        ERROR(Log.ERROR)
+    }
+
+    fun d(tag: String = DEFAULT_TAG, messageProvider: () -> String) {
+        log(Level.DEBUG, tag, messageProvider)
+    }
+
+    fun i(tag: String = DEFAULT_TAG, messageProvider: () -> String) {
+        log(Level.INFO, tag, messageProvider)
+    }
+
+    fun w(tag: String = DEFAULT_TAG, throwable: Throwable? = null, messageProvider: () -> String) {
+        log(Level.WARN, tag, messageProvider, throwable)
+    }
+
+    fun e(tag: String = DEFAULT_TAG, throwable: Throwable? = null, messageProvider: () -> String) {
+        log(Level.ERROR, tag, messageProvider, throwable)
+    }
+
+    private fun log(
+        level: Level,
+        tag: String,
+        messageProvider: () -> String,
+        throwable: Throwable? = null
+    ) {
+        if (!BuildConfig.DEBUG) return
+
+        val message = messageProvider()
+        if (throwable != null) {
+            Log.println(level.androidLevel, tag, "$message\n${Log.getStackTraceString(throwable)}")
+        } else {
+            Log.println(level.androidLevel, tag, message)
+        }
+    }
+}

android/app/src/main/java/com/atridad/ascently/utils/ImageUtils.kt

@@ -6,7 +6,6 @@ import android.graphics.Bitmap
 import android.graphics.BitmapFactory
 import android.graphics.ImageDecoder
 import android.net.Uri
-import android.util.Log
 import androidx.core.graphics.scale
 import androidx.exifinterface.media.ExifInterface
 import java.io.File
@@ -30,17 +29,17 @@ object ImageUtils {
 
     /** Saves an image from a URI while preserving EXIF orientation data */
     private fun saveImageWithExif(
-            context: Context,
-            imageUri: Uri,
-            originalBitmap: Bitmap,
-            outputFile: File
+        context: Context,
+        imageUri: Uri,
+        originalBitmap: Bitmap,
+        outputFile: File
     ): Boolean {
         return try {
             // Get EXIF data from original image
             val originalExif =
-                    context.contentResolver.openInputStream(imageUri)?.use { input ->
-                        ExifInterface(input)
-                    }
+                context.contentResolver.openInputStream(imageUri)?.use { input ->
+                    ExifInterface(input)
+                }
 
             // Compress and save the bitmap
             val compressedBitmap = compressImage(originalBitmap)
@@ -73,7 +72,7 @@ object ImageUtils {
             compressedBitmap.recycle()
             true
         } catch (e: Exception) {
-            e.printStackTrace()
+            AppLogger.e("ImageUtils", e) { "Error saving image with EXIF data" }
             false
         }
     }
@@ -86,11 +85,11 @@ object ImageUtils {
 
         // Calculate the scaling factor
         val scaleFactor =
-                if (width > height) {
-                    if (width > MAX_IMAGE_SIZE) MAX_IMAGE_SIZE.toFloat() / width else 1f
-                } else {
-                    if (height > MAX_IMAGE_SIZE) MAX_IMAGE_SIZE.toFloat() / height else 1f
-                }
+            if (width > height) {
+                if (width > MAX_IMAGE_SIZE) MAX_IMAGE_SIZE.toFloat() / width else 1f
+            } else {
+                if (height > MAX_IMAGE_SIZE) MAX_IMAGE_SIZE.toFloat() / height else 1f
+            }
 
         return if (scaleFactor < 1f) {
             val newWidth = (width * scaleFactor).toInt()
@@ -119,7 +118,7 @@ object ImageUtils {
             val file = getImageFile(context, relativePath)
             file.delete()
         } catch (e: Exception) {
-            e.printStackTrace()
+            AppLogger.e("ImageUtils", e) { "Failed to delete image: $relativePath" }
             false
         }
     }
@@ -137,7 +136,7 @@ object ImageUtils {
             sourceFile.copyTo(destFile, overwrite = true)
             "$IMAGES_DIR/$filename"
         } catch (e: Exception) {
-            e.printStackTrace()
+            AppLogger.e("ImageUtils", e) { "Failed to import image from source: ${sourceFile.name}" }
             null
         }
     }
@@ -148,16 +147,16 @@ object ImageUtils {
             val imagesDir = getImagesDirectory(context)
             imagesDir.listFiles()?.mapNotNull { file ->
                 if (file.isFile &&
-                                (file.extension == "jpg" ||
-                                        file.extension == "jpeg" ||
-                                        file.extension == "png")
+                    (file.extension == "jpg" ||
+                            file.extension == "jpeg" ||
+                            file.extension == "png")
                 ) {
                     "$IMAGES_DIR/${file.name}"
                 } else null
             }
-                    ?: emptyList()
+                ?: emptyList()
         } catch (e: Exception) {
-            e.printStackTrace()
+            AppLogger.e("ImageUtils", e) { "Failed to enumerate images directory" }
             emptyList()
         }
     }
@@ -178,50 +177,47 @@ object ImageUtils {
 
             tempFilename
         } catch (e: Exception) {
-            Log.e("ImageUtils", "Error saving temporary image from URI", e)
+            AppLogger.e("ImageUtils", e) { "Error saving temporary image from URI" }
             null
         }
     }
 
     /** Renames a temporary image */
     fun renameTemporaryImage(
-            context: Context,
-            tempFilename: String,
-            problemId: String,
-            imageIndex: Int
+        context: Context,
+        tempFilename: String,
+        problemId: String,
+        imageIndex: Int
     ): String? {
         return try {
             val tempFile = File(getImagesDirectory(context), tempFilename)
             if (!tempFile.exists()) {
-                Log.e("ImageUtils", "Temporary file does not exist: $tempFilename")
+                AppLogger.e("ImageUtils") { "Temporary file does not exist: $tempFilename" }
                 return null
             }
 
             val deterministicFilename =
-                    ImageNamingUtils.generateImageFilename(problemId, imageIndex)
+                ImageNamingUtils.generateImageFilename(problemId, imageIndex)
             val finalFile = File(getImagesDirectory(context), deterministicFilename)
 
             if (tempFile.renameTo(finalFile)) {
-                Log.d(
-                        "ImageUtils",
-                        "Renamed temporary image: $tempFilename -> $deterministicFilename"
-                )
+                AppLogger.d("ImageUtils") { "Renamed temporary image: $tempFilename -> $deterministicFilename" }
                 deterministicFilename
             } else {
-                Log.e("ImageUtils", "Failed to rename temporary image: $tempFilename")
+                AppLogger.e("ImageUtils") { "Failed to rename temporary image: $tempFilename" }
                 null
             }
         } catch (e: Exception) {
-            Log.e("ImageUtils", "Error renaming temporary image", e)
+            AppLogger.e("ImageUtils", e) { "Error renaming temporary image" }
             null
         }
     }
 
     /** Saves image data with a specific filename */
     fun saveImageFromBytesWithFilename(
-            context: Context,
-            imageData: ByteArray,
-            filename: String
+        context: Context,
+        imageData: ByteArray,
+        filename: String
     ): String? {
         return try {
             val imageFile = File(getImagesDirectory(context), filename)
@@ -230,7 +226,7 @@ object ImageUtils {
             if (imageData.size > 5 * 1024 * 1024) { // 5MB threshold
                 // For large images, decode, compress, and try to preserve EXIF
                 val bitmap =
-                        BitmapFactory.decodeByteArray(imageData, 0, imageData.size) ?: return null
+                    BitmapFactory.decodeByteArray(imageData, 0, imageData.size) ?: return null
                 val compressedBitmap = compressImage(bitmap)
 
                 // Save compressed image
@@ -249,7 +245,7 @@ object ImageUtils {
                     destExif.saveAttributes()
                 } catch (e: Exception) {
                     // If EXIF preservation fails, continue without it
-                    Log.w("ImageUtils", "Failed to preserve EXIF data: ${e.message}")
+                    AppLogger.w("ImageUtils") { "Failed to preserve EXIF data: ${e.message}" }
                 }
 
                 bitmap.recycle()
@@ -262,7 +258,7 @@ object ImageUtils {
             // Return relative path
             "$IMAGES_DIR/$filename"
         } catch (e: Exception) {
-            e.printStackTrace()
+            AppLogger.e("ImageUtils", e) { "Failed to save image from bytes: $filename" }
             null
         }
     }
@@ -275,7 +271,7 @@ object ImageUtils {
 
             orphanedImages.forEach { path -> deleteImage(context, path) }
         } catch (e: Exception) {
-            e.printStackTrace()
+            AppLogger.e("ImageUtils", e) { "Failed to clean up orphaned images" }
         }
     }
 }

android/app/src/main/java/com/atridad/ascently/utils/MigrationManager.kt

@@ -2,7 +2,6 @@ package com.atridad.ascently.utils
 
 import android.content.Context
 import android.content.SharedPreferences
-import android.util.Log
 import androidx.core.content.edit
 
 class MigrationManager(private val context: Context) {
@@ -14,7 +13,7 @@ class MigrationManager(private val context: Context) {
     }
 
     private val migrationPrefs: SharedPreferences =
-            context.getSharedPreferences(MIGRATION_PREFS, Context.MODE_PRIVATE)
+        context.getSharedPreferences(MIGRATION_PREFS, Context.MODE_PRIVATE)
 
     /**
      * Perform migration from OpenClimb to Ascently if needed This should be called early in app
@@ -22,11 +21,11 @@ class MigrationManager(private val context: Context) {
      */
     fun migrateIfNeeded() {
         if (migrationPrefs.getBoolean(MIGRATION_COMPLETED_KEY, false)) {
-            Log.d(TAG, "Migration already completed, skipping")
+            AppLogger.d(TAG) { "Migration already completed, skipping" }
             return
         }
 
-        Log.i(TAG, "🔄 Starting migration from OpenClimb to Ascently...")
+        AppLogger.i(TAG) { "🔄 Starting migration from OpenClimb to Ascently..." }
         var migrationCount = 0
 
         // Migrate SharedPreferences
@@ -36,12 +35,9 @@ class MigrationManager(private val context: Context) {
         migrationPrefs.edit { putBoolean(MIGRATION_COMPLETED_KEY, true) }
 
         if (migrationCount > 0) {
-            Log.i(
-                    TAG,
-                    "🎉 Migration completed! Migrated $migrationCount items from OpenClimb to Ascently"
-            )
+            AppLogger.i(TAG) { "🎉 Migration completed! Migrated $migrationCount items from OpenClimb to Ascently" }
         } else {
-            Log.i(TAG, "ℹ️ No OpenClimb data found to migrate")
+            AppLogger.i(TAG) { "ℹ️ No OpenClimb data found to migrate" }
         }
     }
 
@@ -51,12 +47,12 @@ class MigrationManager(private val context: Context) {
 
         // Define preference file migrations
         val preferenceFileMigrations =
-                listOf(
-                        "openclimb_data_state" to "ascently_data_state",
-                        "health_connect_prefs" to "health_connect_prefs", // Keep same name
-                        "deleted_items" to "deleted_items", // Keep same name
-                        "sync_preferences" to "sync_preferences" // Keep same name
-                )
+            listOf(
+                "openclimb_data_state" to "ascently_data_state",
+                "health_connect_prefs" to "health_connect_prefs", // Keep same name
+                "deleted_items" to "deleted_items", // Keep same name
+                "sync_preferences" to "sync_preferences" // Keep same name
+            )
 
         for ((oldFileName, newFileName) in preferenceFileMigrations) {
             if (oldFileName != newFileName) {
@@ -95,10 +91,7 @@ class MigrationManager(private val context: Context) {
             // Clear old preferences
             oldPrefs.edit { clear() }
 
-            Log.d(
-                    TAG,
-                    "✅ Migrated preference file: $oldFileName → $newFileName (${oldPrefs.all.size} keys)"
-            )
+            AppLogger.d(TAG) { "Migrated preference file: $oldFileName → $newFileName (${oldPrefs.all.size} keys)" }
             return oldPrefs.all.size
         }
 
@@ -111,12 +104,12 @@ class MigrationManager(private val context: Context) {
 
         // Check for any openclimb-prefixed keys across all preference files
         val preferencesToCheck =
-                listOf(
-                        "ascently_data_state",
-                        "health_connect_prefs",
-                        "deleted_items",
-                        "sync_preferences"
-                )
+            listOf(
+                "ascently_data_state",
+                "health_connect_prefs",
+                "deleted_items",
+                "sync_preferences"
+            )
 
         for (prefFileName in preferencesToCheck) {
             val prefs = context.getSharedPreferences(prefFileName, Context.MODE_PRIVATE)
@@ -150,7 +143,7 @@ class MigrationManager(private val context: Context) {
                     }
                 }
 
-                Log.d(TAG, "✅ Migrated ${keysToMigrate.size} keys in $prefFileName")
+                AppLogger.d(TAG) { "Migrated ${keysToMigrate.size} keys in $prefFileName" }
                 count += keysToMigrate.size
             }
         }
@@ -166,6 +159,6 @@ class MigrationManager(private val context: Context) {
     /** Reset migration state (for testing purposes) */
     fun resetMigrationState() {
         migrationPrefs.edit { putBoolean(MIGRATION_COMPLETED_KEY, false) }
-        Log.d(TAG, "Migration state reset")
+        AppLogger.d(TAG) { "Migration state reset" }
     }
 }

android/app/src/main/java/com/atridad/ascently/utils/ZipExportImportUtils.kt

@@ -22,19 +22,19 @@ object ZipExportImportUtils {
 
     /** Creates a ZIP file containing the JSON data and all referenced images */
     fun createExportZip(
-            context: Context,
-            exportData: ClimbDataBackup,
-            referencedImagePaths: Set<String>,
-            directory: File? = null
+        context: Context,
+        exportData: ClimbDataBackup,
+        referencedImagePaths: Set<String>,
+        directory: File? = null
     ): File {
         val exportDir =
-                directory
-                        ?: File(
-                                context.getExternalFilesDir(
-                                        android.os.Environment.DIRECTORY_DOCUMENTS
-                                ),
-                                "Ascently"
-                        )
+            directory
+                ?: File(
+                    context.getExternalFilesDir(
+                        android.os.Environment.DIRECTORY_DOCUMENTS
+                    ),
+                    "Ascently"
+                )
         if (!exportDir.exists()) {
             exportDir.mkdirs()
         }
@@ -52,10 +52,11 @@ object ZipExportImportUtils {
                 zipOut.closeEntry()
 
                 // Add JSON data file
-                val json = Json {
-                    prettyPrint = true
-                    ignoreUnknownKeys = true
-                }
+                val json =
+                    Json {
+                        prettyPrint = true
+                        ignoreUnknownKeys = true
+                    }
                 val jsonString = json.encodeToString(exportData)
 
                 val jsonEntry = ZipEntry(DATA_JSON_FILENAME)
@@ -78,24 +79,21 @@ object ZipExportImportUtils {
                             zipOut.closeEntry()
                             successfulImages++
                         } else {
-                            android.util.Log.w(
-                                    "ZipExportImportUtils",
-                                    "Image file not found or empty: $imagePath"
-                            )
+                            AppLogger.w("ZipExportImportUtils") {
+                                "Image file not found or empty: $imagePath"
+                            }
                         }
                     } catch (e: Exception) {
-                        android.util.Log.e(
-                                "ZipExportImportUtils",
-                                "Failed to add image $imagePath: ${e.message}"
-                        )
+                        AppLogger.e("ZipExportImportUtils", e) {
+                            "Failed to add image $imagePath: ${e.message}"
+                        }
                     }
                 }
 
                 // Log export summary
-                android.util.Log.i(
-                        "ZipExportImportUtils",
-                        "Export completed: ${successfulImages}/${referencedImagePaths.size} images included"
-                )
+                AppLogger.i("ZipExportImportUtils") {
+                    "Export completed: ${successfulImages}/${referencedImagePaths.size} images included"
+                }
             }
 
             // Validate the created ZIP file
@@ -115,10 +113,10 @@ object ZipExportImportUtils {
 
     /** Creates a ZIP file and writes it to a provided URI */
     fun createExportZipToUri(
-            context: Context,
-            uri: android.net.Uri,
-            exportData: ClimbDataBackup,
-            referencedImagePaths: Set<String>
+        context: Context,
+        uri: android.net.Uri,
+        exportData: ClimbDataBackup,
+        referencedImagePaths: Set<String>
     ) {
         try {
             context.contentResolver.openOutputStream(uri)?.use { outputStream ->
@@ -131,10 +129,11 @@ object ZipExportImportUtils {
                     zipOut.closeEntry()
 
                     // Add JSON data file
-                    val json = Json {
-                        prettyPrint = true
-                        ignoreUnknownKeys = true
-                    }
+                    val json =
+                        Json {
+                            prettyPrint = true
+                            ignoreUnknownKeys = true
+                        }
                     val jsonString = json.encodeToString(exportData)
 
                     val jsonEntry = ZipEntry(DATA_JSON_FILENAME)
@@ -158,28 +157,26 @@ object ZipExportImportUtils {
                                 successfulImages++
                             }
                         } catch (e: Exception) {
-                            android.util.Log.e(
-                                    "ZipExportImportUtils",
-                                    "Failed to add image $imagePath: ${e.message}"
-                            )
+                            AppLogger.e("ZipExportImportUtils", e) {
+                                "Failed to add image $imagePath: ${e.message}"
+                            }
                         }
                     }
 
-                    android.util.Log.i(
-                            "ZipExportImportUtils",
-                            "Export to URI completed: ${successfulImages}/${referencedImagePaths.size} images included"
-                    )
+                    AppLogger.i("ZipExportImportUtils") {
+                        "Export to URI completed: ${successfulImages}/${referencedImagePaths.size} images included"
+                    }
                 }
             }
-                    ?: throw IOException("Could not open output stream")
+                ?: throw IOException("Could not open output stream")
         } catch (e: Exception) {
             throw IOException("Failed to create export ZIP to URI: ${e.message}")
         }
     }
 
     private fun createMetadata(
-            exportData: ClimbDataBackup,
-            referencedImagePaths: Set<String>
+        exportData: ClimbDataBackup,
+        referencedImagePaths: Set<String>
     ): String {
         return buildString {
             appendLine("Ascently Export Metadata")
@@ -197,8 +194,8 @@ object ZipExportImportUtils {
 
     /** Data class to hold extraction results */
     data class ImportResult(
-            val jsonContent: String,
-            val importedImagePaths: Map<String, String> // original filename -> new relative path
+        val jsonContent: String,
+        val importedImagePaths: Map<String, String> // original filename -> new relative path
     )
 
     /** Extracts a ZIP file and returns the JSON content and imported image paths */
@@ -217,16 +214,17 @@ object ZipExportImportUtils {
                             // Read metadata for validation
                             val metadataContent = zipIn.readBytes().toString(Charsets.UTF_8)
                             foundRequiredFiles.add("metadata")
-                            android.util.Log.i(
-                                    "ZipExportImportUtils",
-                                    "Found metadata: ${metadataContent.lines().take(3).joinToString()}"
-                            )
+                            AppLogger.i("ZipExportImportUtils") {
+                                "Found metadata: ${metadataContent.lines().take(3).joinToString()}"
+                            }
                         }
+
                         entry.name == DATA_JSON_FILENAME -> {
                             // Read JSON data
                             jsonContent = zipIn.readBytes().toString(Charsets.UTF_8)
                             foundRequiredFiles.add("data")
                         }
+
                         entry.name.startsWith("$IMAGES_DIR_NAME/") && !entry.isDirectory -> {
                             // Extract image file
                             val originalFilename = entry.name.substringAfter("$IMAGES_DIR_NAME/")
@@ -234,11 +232,11 @@ object ZipExportImportUtils {
                             try {
                                 // Create temporary file to hold the extracted image
                                 val tempFile =
-                                        File.createTempFile(
-                                                "import_image_",
-                                                "_$originalFilename",
-                                                context.cacheDir
-                                        )
+                                    File.createTempFile(
+                                        "import_image_",
+                                        "_$originalFilename",
+                                        context.cacheDir
+                                    )
 
                                 FileOutputStream(tempFile).use { output -> zipIn.copyTo(output) }
 
@@ -248,37 +246,33 @@ object ZipExportImportUtils {
                                     val newPath = ImageUtils.importImageFile(context, tempFile)
                                     if (newPath != null) {
                                         importedImagePaths[originalFilename] = newPath
-                                        android.util.Log.d(
-                                                "ZipExportImportUtils",
-                                                "Successfully imported image: $originalFilename -> $newPath"
-                                        )
+                                        AppLogger.d("ZipExportImportUtils") {
+                                            "Successfully imported image: $originalFilename -> $newPath"
+                                        }
                                     } else {
-                                        android.util.Log.w(
-                                                "ZipExportImportUtils",
-                                                "Failed to import image: $originalFilename"
-                                        )
+                                        AppLogger.w("ZipExportImportUtils") {
+                                            "Failed to import image: $originalFilename"
+                                        }
                                     }
                                 } else {
-                                    android.util.Log.w(
-                                            "ZipExportImportUtils",
-                                            "Extracted image is empty: $originalFilename"
-                                    )
+                                    AppLogger.w("ZipExportImportUtils") {
+                                        "Extracted image is empty: $originalFilename"
+                                    }
                                 }
 
                                 // Clean up temp file
                                 tempFile.delete()
                             } catch (e: Exception) {
-                                android.util.Log.e(
-                                        "ZipExportImportUtils",
-                                        "Failed to process image $originalFilename: ${e.message}"
-                                )
+                                AppLogger.e("ZipExportImportUtils", e) {
+                                    "Failed to process image $originalFilename: ${e.message}"
+                                }
                             }
                         }
+
                         else -> {
-                            android.util.Log.d(
-                                    "ZipExportImportUtils",
-                                    "Skipping ZIP entry: ${entry.name}"
-                            )
+                            AppLogger.d("ZipExportImportUtils") {
+                                "Skipping ZIP entry: ${entry.name}"
+                            }
                         }
                     }
 
@@ -296,10 +290,9 @@ object ZipExportImportUtils {
                 throw IOException("Invalid ZIP file: data.json is empty")
             }
 
-            android.util.Log.i(
-                    "ZipExportImportUtils",
-                    "Import extraction completed: ${importedImagePaths.size} images processed"
-            )
+            AppLogger.i("ZipExportImportUtils") {
+                "Import extraction completed: ${importedImagePaths.size} images processed"
+            }
 
             return ImportResult(jsonContent, importedImagePaths)
         } catch (e: Exception) {
@@ -312,16 +305,16 @@ object ZipExportImportUtils {
      * the new ones after import
      */
     fun updateProblemImagePaths(
-            problems: List<BackupProblem>,
-            imagePathMapping: Map<String, String>
+        problems: List<BackupProblem>,
+        imagePathMapping: Map<String, String>
     ): List<BackupProblem> {
         return problems.map { problem ->
             val updatedImagePaths =
-                    (problem.imagePaths ?: emptyList()).mapNotNull { oldPath ->
-                        // Extract filename from the old path
-                        val filename = oldPath.substringAfterLast("/")
-                        imagePathMapping[filename]
-                    }
+                (problem.imagePaths ?: emptyList()).mapNotNull { oldPath ->
+                    // Extract filename from the old path
+                    val filename = oldPath.substringAfterLast("/")
+                    imagePathMapping[filename]
+                }
             problem.withUpdatedImagePaths(updatedImagePaths)
         }
     }

android/app/src/main/java/com/atridad/ascently/widget/ClimbStatsWidgetProvider.kt

@@ -11,6 +11,7 @@ import com.atridad.ascently.MainActivity
 import com.atridad.ascently.R
 import com.atridad.ascently.data.database.AscentlyDatabase
 import com.atridad.ascently.data.repository.ClimbRepository
+import java.time.LocalDate
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.SupervisorJob
@@ -48,53 +49,47 @@ class ClimbStatsWidgetProvider : AppWidgetProvider() {
                 val database = AscentlyDatabase.getDatabase(context)
                 val repository = ClimbRepository(database, context)
 
-                // Fetch stats data
+                // Get last 7 days date range (rolling period)
+                val today = LocalDate.now()
+                val sevenDaysAgo = today.minusDays(6) // Today + 6 days ago = 7 days total
+
+                // Fetch all sessions and attempts
                 val sessions = repository.getAllSessions().first()
-                val problems = repository.getAllProblems().first()
                 val attempts = repository.getAllAttempts().first()
-                val gyms = repository.getAllGyms().first()
 
-                // Calculate stats
-                val completedSessions = sessions.filter { it.endTime != null }
-
-                // Count problems that have been completed (have at least one successful attempt)
-                val completedProblems =
-                        problems
-                                .filter { problem ->
-                                    attempts.any { attempt ->
-                                        attempt.problemId == problem.id &&
-                                                (attempt.result ==
-                                                        com.atridad.ascently.data.model
-                                                                .AttemptResult.SUCCESS ||
-                                                        attempt.result ==
-                                                                com.atridad.ascently.data.model
-                                                                        .AttemptResult.FLASH)
-                                    }
-                                }
-                                .size
-
-                val favoriteGym =
-                        sessions.groupBy { it.gymId }.maxByOrNull { it.value.size }?.let {
-                                (gymId, _) ->
-                            gyms.find { it.id == gymId }?.name
+                // Filter for last 7 days across all gyms
+                val weekSessions =
+                        sessions.filter { session ->
+                            try {
+                                val sessionDate = LocalDate.parse(session.date.substring(0, 10))
+                                !sessionDate.isBefore(sevenDaysAgo) && !sessionDate.isAfter(today)
+                            } catch (_: Exception) {
+                                false
+                            }
                         }
-                                ?: "No sessions yet"
+
+                val weekSessionIds = weekSessions.map { it.id }.toSet()
+
+                // Count total attempts this week
+                val totalAttempts =
+                        attempts.count { attempt -> weekSessionIds.contains(attempt.sessionId) }
+
+                // Count sessions this week
+                val totalSessions = weekSessions.size
 
                 launch(Dispatchers.Main) {
                     val views = RemoteViews(context.packageName, R.layout.widget_climb_stats)
 
-                    views.setTextViewText(
-                            R.id.widget_total_sessions,
-                            completedSessions.size.toString()
-                    )
-                    views.setTextViewText(
-                            R.id.widget_problems_completed,
-                            completedProblems.toString()
-                    )
-                    views.setTextViewText(R.id.widget_total_problems, problems.size.toString())
-                    views.setTextViewText(R.id.widget_favorite_gym, favoriteGym)
+                    // Set weekly stats
+                    views.setTextViewText(R.id.widget_attempts_value, totalAttempts.toString())
+                    views.setTextViewText(R.id.widget_sessions_value, totalSessions.toString())
 
-                    val intent = Intent(context, MainActivity::class.java)
+                    val intent =
+                            Intent(context, MainActivity::class.java).apply {
+                                flags =
+                                        Intent.FLAG_ACTIVITY_NEW_TASK or
+                                                Intent.FLAG_ACTIVITY_CLEAR_TOP
+                            }
                     val pendingIntent =
                             PendingIntent.getActivity(
                                     context,
@@ -110,10 +105,8 @@ class ClimbStatsWidgetProvider : AppWidgetProvider() {
             } catch (_: Exception) {
                 launch(Dispatchers.Main) {
                     val views = RemoteViews(context.packageName, R.layout.widget_climb_stats)
-                    views.setTextViewText(R.id.widget_total_sessions, "0")
-                    views.setTextViewText(R.id.widget_problems_completed, "0")
-                    views.setTextViewText(R.id.widget_total_problems, "0")
-                    views.setTextViewText(R.id.widget_favorite_gym, "No data")
+                    views.setTextViewText(R.id.widget_attempts_value, "0")
+                    views.setTextViewText(R.id.widget_sessions_value, "0")
 
                     val intent = Intent(context, MainActivity::class.java)
                     val pendingIntent =

android/app/src/main/res/drawable/ic_checkmark_circle.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#000000"
+        android:pathData="M12,2C6.48,2 2,6.48 2,12C2,17.52 6.48,22 12,22C17.52,22 22,17.52 22,12C22,6.48 17.52,2 12,2ZM10,17L5,12L6.41,10.59L10,14.17L17.59,6.58L19,8L10,17Z"/>
+</vector>

android/app/src/main/res/drawable/ic_circle_filled.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#000000"
+        android:pathData="M9,11.24V7.5C9,6.12 10.12,5 11.5,5S14,6.12 14,7.5v3.74c1.21,-0.81 2,-2.18 2,-3.74C16,5.01 13.99,3 11.5,3S7,5.01 7,7.5C7,9.06 7.79,10.43 9,11.24zM18.84,15.87l-4.54,-2.26c-0.17,-0.07 -0.35,-0.11 -0.54,-0.11H13v-6C13,6.67 12.33,6 11.5,6S10,6.67 10,7.5v10.74l-3.43,-0.72c-0.08,-0.01 -0.15,-0.03 -0.24,-0.03c-0.31,0 -0.59,0.13 -0.79,0.33l-0.79,0.8l4.94,4.94C9.96,23.83 10.34,24 10.75,24h6.79c0.75,0 1.33,-0.55 1.44,-1.28l0.75,-5.27c0.01,-0.07 0.02,-0.14 0.02,-0.2C19.75,16.63 19.37,16.09 18.84,15.87z"/>
+</vector>

android/app/src/main/res/layout/widget_climb_stats.xml

@@ -5,190 +5,84 @@
     android:layout_height="match_parent"
     android:background="@drawable/widget_background"
     android:orientation="vertical"
-    android:padding="12dp">
+    android:padding="12dp"
+    android:gravity="center">
 
-    <!-- Header -->
+    <!-- Header with icon and "Weekly" text -->
     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:gravity="center_vertical"
         android:orientation="horizontal"
+        android:gravity="center_vertical"
         android:layout_marginBottom="12dp">
 
         <ImageView
-            android:layout_width="24dp"
-            android:layout_height="24dp"
+            android:layout_width="28dp"
+            android:layout_height="28dp"
             android:src="@drawable/ic_mountains"
             android:tint="@color/widget_primary"
-            android:layout_marginEnd="8dp" />
-
-        <TextView
-            android:layout_width="0dp"
-            android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:text="Ascently"
-            android:textSize="16sp"
-            android:textStyle="bold"
-            android:textColor="@color/widget_text_primary" />
+            android:layout_marginEnd="8dp"
+            android:contentDescription="@string/ascently_icon" />
 
         <TextView
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:text="Climbing Stats"
-            android:textSize="12sp"
-            android:textColor="@color/widget_text_secondary" />
+            android:text="@string/weekly"
+            android:textSize="18sp"
+            android:textColor="@color/widget_text_primary" />
 
     </LinearLayout>
 
-    <!-- Stats Grid -->
+    <!-- Attempts Row -->
     <LinearLayout
         android:layout_width="match_parent"
-        android:layout_height="0dp"
-        android:layout_weight="1"
-        android:orientation="vertical"
-        android:gravity="center">
+        android:layout_height="wrap_content"
+        android:orientation="horizontal"
+        android:gravity="center_vertical"
+        android:layout_marginBottom="12dp">
 
-        <!-- Top Row -->
-        <LinearLayout
-            android:layout_width="match_parent"
-            android:layout_height="0dp"
-            android:layout_weight="1"
-            android:orientation="horizontal"
-            android:layout_marginBottom="8dp">
+        <ImageView
+            android:layout_width="32dp"
+            android:layout_height="32dp"
+            android:src="@drawable/ic_circle_filled"
+            android:tint="@color/widget_primary"
+            android:layout_marginEnd="12dp"
+            android:contentDescription="Attempts icon" />
 
-            <!-- Sessions Card -->
-            <LinearLayout
-                android:layout_width="0dp"
-                android:layout_height="match_parent"
-                android:layout_weight="1"
-                android:orientation="vertical"
-                android:gravity="center"
-                android:background="@drawable/widget_stat_card_background"
-                android:layout_marginEnd="4dp"
-                android:padding="12dp">
+        <TextView
+            android:id="@+id/widget_attempts_value"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="0"
+            android:textSize="40sp"
+            android:textStyle="bold"
+            android:textColor="@color/widget_text_primary" />
 
-                <TextView
-                    android:id="@+id/widget_total_sessions"
-                    android:layout_width="wrap_content"
-                    android:layout_height="wrap_content"
-                    android:text="0"
-                    android:textSize="22sp"
-                    android:textStyle="bold"
-                    android:textColor="@color/widget_primary" />
+    </LinearLayout>
 
-                <TextView
-                    android:layout_width="wrap_content"
-                    android:layout_height="wrap_content"
-                    android:text="Sessions"
-                    android:textSize="12sp"
-                    android:textColor="@color/widget_text_secondary"
-                    android:layout_marginTop="2dp" />
+    <!-- Sessions Row -->
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal"
+        android:gravity="center_vertical">
 
-            </LinearLayout>
+        <ImageView
+            android:layout_width="32dp"
+            android:layout_height="32dp"
+            android:src="@drawable/ic_play_arrow_24"
+            android:tint="@color/widget_primary"
+            android:layout_marginEnd="12dp"
+            android:contentDescription="@string/sessions_icon" />
 
-            <!-- Problems Card -->
-            <LinearLayout
-                android:layout_width="0dp"
-                android:layout_height="match_parent"
-                android:layout_weight="1"
-                android:orientation="vertical"
-                android:gravity="center"
-                android:background="@drawable/widget_stat_card_background"
-                android:layout_marginStart="4dp"
-                android:padding="12dp">
-
-                <TextView
-                    android:id="@+id/widget_problems_completed"
-                    android:layout_width="wrap_content"
-                    android:layout_height="wrap_content"
-                    android:text="0"
-                    android:textSize="22sp"
-                    android:textStyle="bold"
-                    android:textColor="@color/widget_primary" />
-
-                <TextView
-                    android:layout_width="wrap_content"
-                    android:layout_height="wrap_content"
-                    android:text="Completed"
-                    android:textSize="12sp"
-                    android:textColor="@color/widget_text_secondary"
-                    android:layout_marginTop="2dp" />
-
-            </LinearLayout>
-
-        </LinearLayout>
-
-        <!-- Bottom Row -->
-        <LinearLayout
-            android:layout_width="match_parent"
-            android:layout_height="0dp"
-            android:layout_weight="1"
-            android:orientation="horizontal">
-
-            <!-- Success Rate Card -->
-            <LinearLayout
-                android:layout_width="0dp"
-                android:layout_height="match_parent"
-                android:layout_weight="1"
-                android:orientation="vertical"
-                android:gravity="center"
-                android:background="@drawable/widget_stat_card_background"
-                android:layout_marginEnd="4dp"
-                android:padding="12dp">
-
-                <TextView
-                    android:id="@+id/widget_total_problems"
-                    android:layout_width="wrap_content"
-                    android:layout_height="wrap_content"
-                    android:text="0"
-                    android:textSize="22sp"
-                    android:textStyle="bold"
-                    android:textColor="@color/widget_secondary" />
-
-                <TextView
-                    android:layout_width="wrap_content"
-                    android:layout_height="wrap_content"
-                    android:text="Problems"
-                    android:textSize="12sp"
-                    android:textColor="@color/widget_text_secondary"
-                    android:layout_marginTop="2dp" />
-
-            </LinearLayout>
-
-            <!-- Favorite Gym Card -->
-            <LinearLayout
-                android:layout_width="0dp"
-                android:layout_height="match_parent"
-                android:layout_weight="1"
-                android:orientation="vertical"
-                android:gravity="center"
-                android:background="@drawable/widget_stat_card_background"
-                android:layout_marginStart="4dp"
-                android:padding="12dp">
-
-                <TextView
-                    android:id="@+id/widget_favorite_gym"
-                    android:layout_width="wrap_content"
-                    android:layout_height="wrap_content"
-                    android:text="No gyms"
-                    android:textSize="13sp"
-                    android:textStyle="bold"
-                    android:textColor="@color/widget_accent"
-                    android:gravity="center"
-                    android:maxLines="2"
-                    android:ellipsize="end" />
-
-                <TextView
-                    android:layout_width="wrap_content"
-                    android:layout_height="wrap_content"
-                    android:text="Favorite"
-                    android:textSize="12sp"
-                    android:textColor="@color/widget_text_secondary"
-                    android:layout_marginTop="2dp" />
-
-            </LinearLayout>
-
-        </LinearLayout>
+        <TextView
+            android:id="@+id/widget_sessions_value"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/_0"
+            android:textSize="40sp"
+            android:textStyle="bold"
+            android:textColor="@color/widget_text_primary" />
 
     </LinearLayout>
 

android/app/src/main/res/values/strings.xml

@@ -12,5 +12,9 @@
     <string name="shortcut_end_session_disabled">No active session to end</string>
 
     <!-- Widget -->
-    <string name="widget_description">View your climbing stats at a glance</string>
+    <string name="widget_description">View your weekly climbing stats</string>
+    <string name="ascently_icon">Ascently icon</string>
+    <string name="weekly">Weekly</string>
+    <string name="sessions_icon">Sessions icon</string>
+    <string name="_0">0</string>
 </resources>

android/app/src/main/res/xml/data_extraction_rules.xml

@@ -5,10 +5,6 @@
 -->
 <data-extraction-rules>
     <cloud-backup>
-        <!-- TODO: Use <include> and <exclude> to control what is backed up.
-        <include .../>
-        <exclude .../>
-        -->
     </cloud-backup>
     <!--
     <device-transfer>

android/app/src/main/res/xml/widget_climb_stats_info.xml

@@ -3,15 +3,14 @@
     android:description="@string/widget_description"
     android:initialKeyguardLayout="@layout/widget_climb_stats"
     android:initialLayout="@layout/widget_climb_stats"
-    android:minWidth="250dp"
-    android:minHeight="180dp"
+    android:minWidth="110dp"
+    android:minHeight="110dp"
+    android:maxResizeWidth="110dp"
+    android:maxResizeHeight="110dp"
     android:previewImage="@drawable/ic_mountains"
     android:previewLayout="@layout/widget_climb_stats"
-    android:resizeMode="horizontal|vertical"
-    android:targetCellWidth="4"
+    android:resizeMode="none"
+    android:targetCellWidth="2"
     android:targetCellHeight="2"
     android:updatePeriodMillis="1800000"
-    android:widgetCategory="home_screen"
-    android:widgetFeatures="reconfigurable"
-    android:maxResizeWidth="320dp"
-    android:maxResizeHeight="240dp" />
+    android:widgetCategory="home_screen" />

android/gradle/libs.versions.toml

@@ -1,6 +1,6 @@
 [versions]
 agp = "8.12.3"
-kotlin = "2.2.20"
+kotlin = "2.2.21"
 coreKtx = "1.17.0"
 junit = "4.13.2"
 junitVersion = "1.3.0"
@@ -9,17 +9,17 @@ androidxTestCore = "1.7.0"
 androidxTestExt = "1.3.0"
 androidxTestRunner = "1.7.0"
 androidxTestRules = "1.7.0"
-lifecycleRuntimeKtx = "2.9.4"
-activityCompose = "1.11.0"
-composeBom = "2025.10.00"
-room = "2.8.2"
-navigation = "2.9.5"
-viewmodel = "2.9.4"
+lifecycleRuntimeKtx = "2.10.0"
+activityCompose = "1.12.0"
+composeBom = "2025.11.01"
+room = "2.8.4"
+navigation = "2.9.6"
+viewmodel = "2.10.0"
 kotlinxSerialization = "1.9.0"
 kotlinxCoroutines = "1.10.2"
 coil = "2.7.0"
 ksp = "2.2.20-2.0.3"
-exifinterface = "1.3.6"
+exifinterface = "1.4.1"
 
 [libraries]
 androidx-core-ktx = { group = "androidx.core", name = "core-ktx", version.ref = "coreKtx" }

docs/package.json

@@ -1,7 +1,7 @@
 {
   "name": "ascently-docs",
   "type": "module",
-  "version": "1.0.0",
+  "version": "1.1.0",
   "description": "Documentation site for Ascently - FOSS climbing tracking app",
   "repository": {
     "type": "git",
@@ -25,9 +25,13 @@
     "astro": "astro"
   },
   "dependencies": {
-    "@astrojs/node": "^9.5.0",
-    "@astrojs/starlight": "^0.36.1",
-    "astro": "^5.14.5",
-    "sharp": "^0.34.4"
+    "@astrojs/node": "^9.5.1",
+    "@astrojs/starlight": "^0.37.0",
+    "astro": "^5.16.3",
+    "qrcode": "^1.5.4",
+    "sharp": "^0.34.5"
+  },
+  "devDependencies": {
+    "@types/qrcode": "^1.5.6"
   }
 }

docs/src/components/DownloadButtons.astro

@@ -0,0 +1,155 @@
+---
+import { Tabs, TabItem } from "@astrojs/starlight/components";
+import { Card, CardGrid } from "@astrojs/starlight/components";
+import { LinkButton } from "@astrojs/starlight/components";
+import { Badge } from "@astrojs/starlight/components";
+import QRCode from "./QRCode.astro";
+import { downloadLinks, requirements } from "../config";
+
+interface Props {
+    showQR?: boolean;
+}
+
+const { showQR = false } = Astro.props;
+
+const hasLink = (link: string | undefined) => link && link.trim() !== "";
+---
+
+<Tabs syncKey="platform">
+    <TabItem label="Android" icon="star">
+        <CardGrid>
+            {
+                hasLink(downloadLinks.android.playStore) && (
+                    <Card title="Google Play Store" icon="star">
+                        <p style="text-align: center;">
+                            <LinkButton
+                                href={downloadLinks.android.playStore}
+                                variant="primary"
+                                icon="external"
+                            >
+                                Get on Play Store
+                            </LinkButton>
+                        </p>
+                        {showQR && (
+                            <p style="text-align: center;">
+                                <QRCode
+                                    data={downloadLinks.android.playStore}
+                                    size={200}
+                                    alt="QR code for Play Store"
+                                />
+                            </p>
+                        )}
+                    </Card>
+                )
+            }
+
+            {
+                hasLink(downloadLinks.android.obtainium) && (
+                    <Card title="Obtainium" icon="rocket">
+                        <p style="text-align: center;">
+                            <LinkButton
+                                href={downloadLinks.android.obtainium}
+                                variant="primary"
+                                icon="external"
+                            >
+                                Get on Obtainium
+                            </LinkButton>
+                        </p>
+                        {showQR && (
+                            <p style="text-align: center;">
+                                <QRCode
+                                    data={downloadLinks.android.obtainium}
+                                    size={200}
+                                    alt="QR code for Obtainium"
+                                />
+                            </p>
+                        )}
+                    </Card>
+                )
+            }
+
+            {
+                hasLink(downloadLinks.android.releases) && (
+                    <Card title="Direct Download" icon="download">
+                        <p style="text-align: center;">
+                            <LinkButton
+                                href={downloadLinks.android.releases}
+                                variant="secondary"
+                                icon="external"
+                            >
+                                Download APK
+                            </LinkButton>
+                        </p>
+                        {showQR && (
+                            <p style="text-align: center;">
+                                <QRCode
+                                    data={downloadLinks.android.releases}
+                                    size={200}
+                                    alt="QR code for APK download"
+                                />
+                            </p>
+                        )}
+                    </Card>
+                )
+            }
+        </CardGrid>
+
+        <p><strong>Requirements:</strong> {requirements.android}</p>
+    </TabItem>
+
+    <TabItem label="iOS" icon="apple">
+        <CardGrid>
+            {
+                hasLink(downloadLinks.ios.appStore) && (
+                    <Card title="App Store" icon="rocket">
+                        <p style="text-align: center;">
+                            <LinkButton
+                                href={downloadLinks.ios.appStore}
+                                variant="primary"
+                                icon="external"
+                            >
+                                Download on App Store
+                            </LinkButton>
+                        </p>
+                        {showQR && (
+                            <p style="text-align: center;">
+                                <QRCode
+                                    data={downloadLinks.ios.appStore}
+                                    size={200}
+                                    alt="QR code for App Store"
+                                />
+                            </p>
+                        )}
+                    </Card>
+                )
+            }
+
+            {
+                hasLink(downloadLinks.ios.testFlight) && (
+                    <Card title="TestFlight Beta" icon="warning">
+                        <p style="text-align: center;">
+                            <LinkButton
+                                href={downloadLinks.ios.testFlight}
+                                variant="secondary"
+                                icon="external"
+                            >
+                                Join TestFlight
+                            </LinkButton>
+                        </p>
+                        {showQR && (
+                            <p style="text-align: center;">
+                                <QRCode
+                                    data={downloadLinks.ios.testFlight}
+                                    size={200}
+                                    alt="QR code for TestFlight"
+                                />
+                            </p>
+                        )}
+                    </Card>
+                )
+            }
+        </CardGrid>
+
+        <p><strong>Requirements:</strong> {requirements.ios}</p>
+    </TabItem>
+</Tabs>

docs/src/components/QRCode.astro

@@ -0,0 +1,111 @@
+---
+import * as QR from "qrcode";
+
+interface Props {
+    data: string;
+    size?: number;
+    alt?: string;
+}
+
+const { data, size = 200, alt = "QR Code" } = Astro.props;
+
+// Generate QR code for dark mode
+let darkModeQR = "";
+try {
+    darkModeQR = await QR.toDataURL(data, {
+        width: size,
+        margin: 2,
+        color: {
+            dark: "#FFBF00",
+            light: "#17181C",
+        },
+    });
+} catch (err) {
+    console.error("Failed to generate dark mode QR code:", err);
+}
+
+// Generate QR code for light mode
+let lightModeQR = "";
+try {
+    lightModeQR = await QR.toDataURL(data, {
+        width: size,
+        margin: 2,
+        color: {
+            dark: "#F24B3C",
+            light: "#FFFFFF",
+        },
+    });
+} catch (err) {
+    console.error("Failed to generate light mode QR code:", err);
+}
+
+const uniqueId = `qr-${Math.random().toString(36).substr(2, 9)}`;
+---
+
+{
+    (darkModeQR || lightModeQR) && (
+        <img
+            id={uniqueId}
+            alt={alt}
+            width={size}
+            height={size}
+            data-light-src={lightModeQR}
+            data-dark-src={darkModeQR}
+            style="margin: auto;"
+        />
+    )
+}
+
+<script is:inline define:vars={{ uniqueId, lightModeQR, darkModeQR }}>
+    (function () {
+        const img = document.getElementById(uniqueId);
+        if (!img) return;
+
+        const theme = document.documentElement.getAttribute("data-theme");
+        if (theme === "dark" && darkModeQR) {
+            img.setAttribute("src", darkModeQR);
+        } else if (lightModeQR) {
+            img.setAttribute("src", lightModeQR);
+        }
+    })();
+</script>
+
+<script>
+    function updateQRCodes() {
+        const theme = document.documentElement.getAttribute("data-theme");
+        const qrImages = document.querySelectorAll(
+            "img[data-light-src][data-dark-src]",
+        );
+
+        qrImages.forEach((img) => {
+            const lightSrc = img.getAttribute("data-light-src");
+            const darkSrc = img.getAttribute("data-dark-src");
+
+            if (theme === "dark" && darkSrc) {
+                img.setAttribute("src", darkSrc);
+            } else if (lightSrc) {
+                img.setAttribute("src", lightSrc);
+            }
+        });
+    }
+
+    // Set initial theme on page load
+    updateQRCodes();
+
+    // Watch for theme changes
+    const observer = new MutationObserver((mutations) => {
+        mutations.forEach((mutation) => {
+            if (
+                mutation.type === "attributes" &&
+                mutation.attributeName === "data-theme"
+            ) {
+                updateQRCodes();
+            }
+        });
+    });
+
+    observer.observe(document.documentElement, {
+        attributes: true,
+        attributeFilter: ["data-theme"],
+    });
+</script>

docs/src/config.ts

@@ -0,0 +1,17 @@
+export const requirements = {
+  android: "Android 12+",
+  ios: "iOS 17+",
+} as const;
+
+export const downloadLinks = {
+  android: {
+    releases: "https://git.atri.dad/atridad/Ascently/tags?q=Android",
+    obtainium:
+      "https://apps.obtainium.imranr.dev/redirect?r=obtainium://add/https://git.atri.dad/atridad/Ascently/releases",
+    playStore: "",
+  },
+  ios: {
+    appStore: "https://apps.apple.com/ca/app/ascently/id6753959144",
+    testFlight: "https://testflight.apple.com/join/E2DYRGH8",
+  },
+} as const;

docs/src/content/docs/download.md

@@ -1,26 +0,0 @@
----
-title: Download
-description: Get Ascently on your Android or iOS device
----
-
-## Android
-
-### Option 1: Direct APK Download
-Download the latest APK from the [Releases page](https://git.atri.dad/atridad/Ascently/releases).
-
-### Option 2: Obtainium
-Use Obtainium for automatic updates:
-
-[<img src="https://github.com/ImranR98/Obtainium/blob/main/assets/graphics/badge_obtainium.png?raw=true" alt="Obtainium" height="41">](https://apps.obtainium.imranr.dev/redirect?r=obtainium://app/%7B%22id%22%3A%22com.atridad.ascently%22%2C%22url%22%3A%22https%3A%2F%2Fgit.atri.dad%2Fatridad%2FAscently%2Freleases%22%2C%22author%22%3A%22git.atri.dad%22%2C%22name%22%3A%22Ascently%22%2C%22preferredApkIndex%22%3A0%2C%22additionalSettings%22%3A%22%7B%5C%22intermediateLink%5C%22%3A%5B%5D%2C%5C%22customLinkFilterRegex%5C%22%3A%5C%22%5C%22%2C%5C%22filterByLinkText%5C%22%3Afalse%2C%5C%22skipSort%5C%22%3Afalse%2C%5C%22reverseSort%5C%22%3Afalse%2C%5C%22sortByLastLinkSegment%5C%22%3Afalse%2C%5C%22versionExtractWholePage%5C%22%3Afalse%2C%5C%22requestHeader%5C%22%3A%5B%7B%5C%22requestHeader%5C%22%3A%5C%22User-Agent%3A%20Mozilla%2F5.0%20(Linux%3B%20Android%2010%3B%20K)%20AppleWebKit%2F537.36%20(KHTML%2C%20like%20Gecko)%20Chrome%2F114.0.0.0%20Mobile%20Safari%2F537.36%5C%22%7D%5D%2C%5C%22defaultPseudoVersioningMethod%5C%22%3A%5C%22partialAPKHash%5C%22%2C%5C%22trackOnly%5C%22%3Afalse%2C%5C%22versionExtractionRegEx%5C%22%3A%5C%22%5C%22%2C%5C%22matchGroupToUse%5C%22%3A%5C%22%5C%22%2C%5C%22versionDetection%5C%22%3Afalse%2C%5C%22useVersionCodeAsOSVersion%5C%22%3Afalse%2C%5C%22apkFilterRegEx%5C%22%3A%5C%22%5C%22%2C%5C%22invertAPKFilter%5C%22%3Afalse%2C%5C%22autoApkFilterByArch%5C%22%3Atrue%2C%5C%22appName%5C%22%3A%5C%22Ascently%5C%22%2C%5C%22appAuthor%5C%22%3A%5C%22%5C%22%2C%5C%22shizukuPretendToBeGooglePlay%5C%22%3Afalse%2C%5C%22allowInsecure%5C%22%3Afalse%2C%5C%22exemptFromBackgroundUpdates%5C%22%3Afalse%2C%5C%22skipUpdateNotifications%5C%22%3Afalse%2C%5C%22about%5C%22%3A%5C%22%5C%22%2C%5C%22refreshBeforeDownload%5C%22%3Afalse%7D%22%2C%22overrideSource%22%3Anull%7D)
-
-## iOS
-
-### App Store
-Download from the app store [here](https://apps.apple.com/ca/app/ascently/id6753959144)
-
-### TestFlight Beta
-Join the TestFlight beta [here](https://testflight.apple.com/join/E2DYRGH8)
-
-## Requirements
-
-- **Android 12+** or **iOS 17+**

docs/src/content/docs/download.mdx

@@ -0,0 +1,10 @@
+---
+title: Download
+description: Get Ascently on your Android or iOS device
+---
+
+import DownloadButtons from '../../components/DownloadButtons.astro';
+
+Get Ascently on your device and start tracking your climbs today!
+
+<DownloadButtons showQR={true} />

docs/src/content/docs/privacy.md

@@ -5,7 +5,7 @@ description: Ascently's Privacy Policy
 
 **Last updated: September 29, 2025**
 
-This Privacy Policy describes our policies and procedures regarding the collection, use, and disclosure of your information when you use my software.
+This Privacy Policy describes my policies and procedures regarding the collection, use, and disclosure of your information when you use my software.
 
 ## No Data Collection
 
@@ -36,7 +36,7 @@ You may optionally integrate with Apple Health or Android Health Connect to impo
 
 This software does not use cookies, tracking pixels, or any other analytics or tracking mechanisms. Your usage of the software is completely private.
 
-## Contact Us
+## Contact
 
 If you have any questions about this Privacy Policy, you can contact me:
 

ios/Ascently.xcodeproj/LiveActivityManager.swift

@@ -25,7 +25,7 @@ final class LiveActivityManager {
                 pushType: nil
             )
         } catch {
-            print("Failed to start live activity: \(error)")
+            AppLogger.error("Failed to start live activity: \(error)", tag: "LegacyLiveActivityManager")
         }
     }
 

ios/Ascently.xcodeproj/project.pbxproj

@@ -465,7 +465,7 @@
 				CODE_SIGN_ENTITLEMENTS = Ascently/Ascently.entitlements;
 				CODE_SIGN_IDENTITY = "Apple Development";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 29;
+				CURRENT_PROJECT_VERSION = 36;
 				DEVELOPMENT_TEAM = 4BC9Y2LL4B;
 				DRIVERKIT_DEPLOYMENT_TARGET = 24.6;
 				ENABLE_PREVIEWS = YES;
@@ -487,7 +487,7 @@
 					"@executable_path/Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 15.6;
-				MARKETING_VERSION = 2.2.0;
+				MARKETING_VERSION = 2.4.2;
 				PRODUCT_BUNDLE_IDENTIFIER = com.atridad.Ascently;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				PROVISIONING_PROFILE_SPECIFIER = "";
@@ -513,7 +513,7 @@
 				CODE_SIGN_ENTITLEMENTS = Ascently/Ascently.entitlements;
 				CODE_SIGN_IDENTITY = "Apple Development";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 29;
+				CURRENT_PROJECT_VERSION = 36;
 				DEVELOPMENT_TEAM = 4BC9Y2LL4B;
 				DRIVERKIT_DEPLOYMENT_TARGET = 24.6;
 				ENABLE_PREVIEWS = YES;
@@ -535,7 +535,7 @@
 					"@executable_path/Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 15.6;
-				MARKETING_VERSION = 2.2.0;
+				MARKETING_VERSION = 2.4.2;
 				PRODUCT_BUNDLE_IDENTIFIER = com.atridad.Ascently;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				PROVISIONING_PROFILE_SPECIFIER = "";
@@ -602,7 +602,7 @@
 				ASSETCATALOG_COMPILER_WIDGET_BACKGROUND_COLOR_NAME = WidgetBackground;
 				CODE_SIGN_ENTITLEMENTS = SessionStatusLiveExtension.entitlements;
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 29;
+				CURRENT_PROJECT_VERSION = 36;
 				DEVELOPMENT_TEAM = 4BC9Y2LL4B;
 				GENERATE_INFOPLIST_FILE = YES;
 				INFOPLIST_FILE = SessionStatusLive/Info.plist;
@@ -613,7 +613,7 @@
 					"@executable_path/Frameworks",
 					"@executable_path/../../Frameworks",
 				);
-				MARKETING_VERSION = 2.2.0;
+				MARKETING_VERSION = 2.4.2;
 				PRODUCT_BUNDLE_IDENTIFIER = com.atridad.Ascently.SessionStatusLive;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
@@ -632,7 +632,7 @@
 				ASSETCATALOG_COMPILER_WIDGET_BACKGROUND_COLOR_NAME = WidgetBackground;
 				CODE_SIGN_ENTITLEMENTS = SessionStatusLiveExtension.entitlements;
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 29;
+				CURRENT_PROJECT_VERSION = 36;
 				DEVELOPMENT_TEAM = 4BC9Y2LL4B;
 				GENERATE_INFOPLIST_FILE = YES;
 				INFOPLIST_FILE = SessionStatusLive/Info.plist;
@@ -643,7 +643,7 @@
 					"@executable_path/Frameworks",
 					"@executable_path/../../Frameworks",
 				);
-				MARKETING_VERSION = 2.2.0;
+				MARKETING_VERSION = 2.4.2;
 				PRODUCT_BUNDLE_IDENTIFIER = com.atridad.Ascently.SessionStatusLive;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;

ios/Ascently/AppIntents/AscentlyShortcuts.swift

@@ -0,0 +1,24 @@
+import AppIntents
+
+/// Defines the App Shortcuts available in the Shortcuts app.
+struct AscentlyShortcuts: AppShortcutsProvider {
+
+    static var shortcutTileColor: ShortcutTileColor {
+        .teal
+    }
+
+    static var appShortcuts: [AppShortcut] {
+        return [
+            AppShortcut(
+                intent: ToggleSessionIntent(),
+                phrases: [
+                    "Toggle climb in \(.applicationName)",
+                    "Start or stop climb in \(.applicationName)",
+                    "Climb toggle in \(.applicationName)",
+                ],
+                shortTitle: "Toggle Session",
+                systemImageName: "figure.climbing"
+            )
+        ]
+    }
+}

ios/Ascently/AppIntents/SessionIntentSupport.swift

@@ -0,0 +1,111 @@
+import Foundation
+
+/// User-visible errors that can arise while handling session-related intents.
+enum SessionIntentError: LocalizedError {
+    case noRecentGym
+    case noActiveSession
+    case failedToStartSession
+    case failedToEndSession
+
+    var errorDescription: String? {
+        switch self {
+        case .noRecentGym:
+            return "There's no recent gym to start a session with."
+        case .noActiveSession:
+            return "There isn't an active session to end right now."
+        case .failedToStartSession:
+            return "Ascently couldn't start a new session."
+        case .failedToEndSession:
+            return "Ascently couldn't finish the active session."
+        }
+    }
+}
+
+struct SessionIntentSummary: Sendable {
+    let sessionId: UUID
+    let gymName: String
+    let status: SessionStatus
+}
+
+/// Controller for handling session operations from App Intents.
+@MainActor
+final class SessionIntentController {
+
+    private let dataManager: ClimbingDataManager
+
+    init(dataManager: ClimbingDataManager = .shared) {
+        self.dataManager = dataManager
+    }
+
+    /// Starts a new session using the most recently visited gym.
+    func startSessionWithLastUsedGym() async throws -> SessionIntentSummary {
+        // Wait for data to load
+        if dataManager.gyms.isEmpty {
+            try? await Task.sleep(nanoseconds: 500_000_000)
+        }
+
+        guard let lastGym = dataManager.getLastUsedGym() else {
+            logFailure(.noRecentGym, context: "No recorded sessions available")
+            throw SessionIntentError.noRecentGym
+        }
+
+        guard let startedSession = await dataManager.startSessionAsync(gymId: lastGym.id) else {
+            logFailure(.failedToStartSession, context: "Data manager failed to create new session")
+            throw SessionIntentError.failedToStartSession
+        }
+
+        return SessionIntentSummary(
+            sessionId: startedSession.id,
+            gymName: lastGym.name,
+            status: startedSession.status
+        )
+    }
+
+    /// Ends the currently active climbing session, if one exists.
+    func endActiveSession() async throws -> SessionIntentSummary {
+        guard let activeSession = dataManager.activeSession else {
+            logFailure(.noActiveSession, context: "No active session stored in data manager")
+            throw SessionIntentError.noActiveSession
+        }
+
+        guard let completedSession = await dataManager.endSessionAsync(activeSession.id) else {
+            logFailure(
+                .failedToEndSession, context: "Data manager failed to complete active session")
+            throw SessionIntentError.failedToEndSession
+        }
+
+        guard let gym = dataManager.gym(withId: completedSession.gymId) else {
+            logFailure(
+                .failedToEndSession,
+                context: "Gym missing for completed session \(completedSession.id)")
+            throw SessionIntentError.failedToEndSession
+        }
+
+        return SessionIntentSummary(
+            sessionId: completedSession.id,
+            gymName: gym.name,
+            status: completedSession.status
+        )
+    }
+
+    private func logFailure(_ error: SessionIntentError, context: String) {
+        // Log error for debugging
+        print("SessionIntentError: \(error). Context: \(context)")
+    }
+
+    /// Toggles the session state: ends active session if one exists, otherwise starts a new one.
+    func toggleSession() async throws -> (summary: SessionIntentSummary, wasStarted: Bool) {
+        // Wait for data to load
+        if dataManager.gyms.isEmpty {
+            try? await Task.sleep(nanoseconds: 500_000_000)
+        }
+
+        if dataManager.activeSession != nil {
+            let summary = try await endActiveSession()
+            return (summary, false)
+        } else {
+            let summary = try await startSessionWithLastUsedGym()
+            return (summary, true)
+        }
+    }
+}

ios/Ascently/AppIntents/ToggleSessionIntent.swift

@@ -0,0 +1,40 @@
+import AppIntents
+import Foundation
+
+/// Toggles the climbing session state: starts a session if none is active, or ends the current one.
+struct ToggleSessionIntent: AppIntent {
+
+    static var title: LocalizedStringResource {
+        "Toggle Climbing Session"
+    }
+
+    static var description: IntentDescription {
+        IntentDescription(
+            "Starts a new session at your last gym if you're not climbing, or ends your current session if you are."
+        )
+    }
+
+    static var openAppWhenRun: Bool {
+        false
+    }
+
+    func perform() async throws -> some IntentResult & ProvidesDialog {
+        // Wait for app initialization
+        try? await Task.sleep(nanoseconds: 1_000_000_000)
+
+        let controller = await SessionIntentController()
+        let (summary, wasStarted) = try await controller.toggleSession()
+
+        if wasStarted {
+            // Wait for Live Activity
+            try? await Task.sleep(nanoseconds: 500_000_000)
+            return .result(dialog: IntentDialog("Session started at \(summary.gymName). Have an awesome climb!"))
+        } else {
+            return .result(dialog: IntentDialog("Session at \(summary.gymName) ended. Nice work!"))
+        }
+    }
+
+    static var parameterSummary: some ParameterSummary {
+        Summary("Toggle my climbing session")
+    }
+}

ios/Ascently/AscentlyApp.swift

@@ -1,10 +1,25 @@
 import SwiftUI
 
+class AppDelegate: NSObject, UIApplicationDelegate {
+    func application(
+        _ application: UIApplication,
+        didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]? = nil
+    ) -> Bool {
+        return true
+    }
+}
+
 @main
 struct AscentlyApp: App {
+    @UIApplicationDelegateAdaptor(AppDelegate.self) var appDelegate
+    @Environment(\.scenePhase) private var scenePhase
+    @StateObject private var themeManager = ThemeManager()
+
     var body: some Scene {
         WindowGroup {
             ContentView()
+                .environmentObject(themeManager)
+                .tint(themeManager.accentColor)
         }
     }
 }

ios/Ascently/Components/PhotoOptionSheet.swift

@@ -8,6 +8,7 @@ struct PhotoOptionSheet: View {
     let onCameraSelected: () -> Void
     let onPhotoLibrarySelected: () -> Void
     let onDismiss: () -> Void
+    @EnvironmentObject var themeManager: ThemeManager
 
     var body: some View {
         NavigationView {
@@ -29,7 +30,7 @@ struct PhotoOptionSheet: View {
                         HStack {
                             Image(systemName: "photo.on.rectangle")
                                 .font(.title2)
-                                .foregroundColor(.blue)
+                                .foregroundColor(themeManager.accentColor)
                             Text("Photo Library")
                                 .font(.headline)
                             Spacer()
@@ -52,7 +53,7 @@ struct PhotoOptionSheet: View {
                         HStack {
                             Image(systemName: "camera.fill")
                                 .font(.title2)
-                                .foregroundColor(.blue)
+                                .foregroundColor(themeManager.accentColor)
                             Text("Camera")
                                 .font(.headline)
                             Spacer()

ios/Ascently/ContentView.swift

@@ -1,7 +1,7 @@
 import SwiftUI
 
 struct ContentView: View {
-    @StateObject private var dataManager = ClimbingDataManager()
+    @StateObject private var dataManager = ClimbingDataManager.shared
     @State private var selectedTab = 0
     @Environment(\.scenePhase) private var scenePhase
     @State private var notificationObservers: [NSObjectProtocol] = []
@@ -91,11 +91,12 @@ struct ContentView: View {
             object: nil,
             queue: .main
         ) { _ in
-            print("App will enter foreground - preparing Live Activity check")
-            Task {
+            Task { @MainActor in
+                AppLogger.info(
+                    "App will enter foreground - preparing Live Activity check", tag: "Lifecycle")
                 // Small delay to ensure app is fully active
                 try? await Task.sleep(nanoseconds: 800_000_000)  // 0.8 seconds
-                await dataManager.onAppBecomeActive()
+                dataManager.onAppBecomeActive()
                 // Re-verify health integration when returning from background
                 await dataManager.healthKitService.verifyAndRestoreIntegration()
             }
@@ -107,10 +108,11 @@ struct ContentView: View {
             object: nil,
             queue: .main
         ) { _ in
-            print("App did become active - checking Live Activity status")
-            Task {
+            Task { @MainActor in
+                AppLogger.info(
+                    "App did become active - checking Live Activity status", tag: "Lifecycle")
                 try? await Task.sleep(nanoseconds: 300_000_000)  // 0.3 seconds
-                await dataManager.onAppBecomeActive()
+                dataManager.onAppBecomeActive()
                 await dataManager.healthKitService.verifyAndRestoreIntegration()
             }
         }

ios/Ascently/Info.plist

@@ -6,6 +6,7 @@
 	<true/>
 	<key>NSSupportsLiveActivities</key>
 	<true/>
+
 	<key>NSPhotoLibraryUsageDescription</key>
 	<string>This app needs access to your photo library to add photos to climbing problems.</string>
 	<key>NSCameraUsageDescription</key>

ios/Ascently/Services/HealthKitService.swift

@@ -38,7 +38,7 @@ class HealthKitService: ObservableObject {
         {
             currentWorkoutStartDate = startDate
             currentWorkoutSessionId = sessionId
-            print("HealthKit: Restored active workout from \(startDate)")
+            AppLogger.info("HealthKit: Restored active workout from \(startDate)", tag: "HealthKit")
         }
     }
 
@@ -56,31 +56,34 @@ class HealthKitService: ObservableObject {
         guard isEnabled else { return }
 
         guard HKHealthStore.isHealthDataAvailable() else {
-            print("HealthKit: Device does not support HealthKit")
+            AppLogger.warning("HealthKit: Device does not support HealthKit", tag: "HealthKit")
             return
         }
 
         checkAuthorization()
 
         if !isAuthorized {
-            print(
-                "HealthKit: Integration was enabled but authorization lost, attempting to restore..."
-            )
+            AppLogger.warning(
+                "HealthKit: Integration was enabled but authorization lost, attempting to restore...",
+                tag: "HealthKit")
 
             do {
                 try await requestAuthorization()
-                print("HealthKit: Authorization restored successfully")
+                AppLogger.info("HealthKit: Authorization restored successfully", tag: "HealthKit")
             } catch {
-                print("HealthKit: Failed to restore authorization: \(error.localizedDescription)")
+                AppLogger.error(
+                    "HealthKit: Failed to restore authorization: \(error.localizedDescription)",
+                    tag: "HealthKit")
             }
         } else {
-            print("HealthKit: Integration verified - authorization is valid")
+            AppLogger.info(
+                "HealthKit: Integration verified - authorization is valid", tag: "HealthKit")
         }
 
         if hasActiveWorkout() {
-            print(
-                "HealthKit: Active workout restored - started at \(currentWorkoutStartDate!)"
-            )
+            AppLogger.info(
+                "HealthKit: Active workout restored - started at \(currentWorkoutStartDate!)",
+                tag: "HealthKit")
         }
     }
 
@@ -130,7 +133,7 @@ class HealthKitService: ObservableObject {
         currentWorkoutStartDate = startDate
         currentWorkoutSessionId = sessionId
         persistActiveWorkout()
-        print("HealthKit: Started workout for session \(sessionId)")
+        AppLogger.info("HealthKit: Started workout for session \(sessionId)", tag: "HealthKit")
     }
 
     func endWorkout(endDate: Date) async throws {
@@ -178,15 +181,17 @@ class HealthKitService: ObservableObject {
             try await builder.endCollection(at: endDate)
             let workout = try await builder.finishWorkout()
 
-            print(
-                "HealthKit: Workout saved successfully with id: \(workout?.uuid.uuidString ?? "unknown")"
-            )
+            AppLogger.info(
+                "HealthKit: Workout saved successfully with id: \(workout?.uuid.uuidString ?? "unknown")",
+                tag: "HealthKit")
 
             currentWorkoutStartDate = nil
             currentWorkoutSessionId = nil
             persistActiveWorkout()
         } catch {
-            print("HealthKit: Failed to save workout: \(error.localizedDescription)")
+            AppLogger.error(
+                "HealthKit: Failed to save workout: \(error.localizedDescription)", tag: "HealthKit"
+            )
             currentWorkoutStartDate = nil
             currentWorkoutSessionId = nil
             persistActiveWorkout()
@@ -199,7 +204,7 @@ class HealthKitService: ObservableObject {
         currentWorkoutStartDate = nil
         currentWorkoutSessionId = nil
         persistActiveWorkout()
-        print("HealthKit: Workout cancelled")
+        AppLogger.info("HealthKit: Workout cancelled", tag: "HealthKit")
     }
 
     func hasActiveWorkout() -> Bool {

ios/Ascently/Services/Sync/SyncMerger.swift

@@ -0,0 +1,181 @@
+import Foundation
+
+struct SyncMerger {
+    private static let logTag = "SyncMerger"
+    
+    static func mergeDataSafely(
+        localBackup: ClimbDataBackup,
+        serverBackup: ClimbDataBackup,
+        dataManager: ClimbingDataManager,
+        imagePathMapping: [String: String]
+    ) throws -> (gyms: [Gym], problems: [Problem], sessions: [ClimbSession], attempts: [Attempt], uniqueDeletions: [DeletedItem]) {
+        
+        // Merge deletion lists first to prevent resurrection of deleted items
+        let localDeletions = dataManager.getDeletedItems()
+        let allDeletions = localDeletions + serverBackup.deletedItems
+        let uniqueDeletions = Array(Set(allDeletions))
+        
+        AppLogger.info("Merging gyms...", tag: logTag)
+        let mergedGyms = mergeGyms(
+            local: dataManager.gyms,
+            server: serverBackup.gyms,
+            deletedItems: uniqueDeletions)
+        
+        AppLogger.info("Merging problems...", tag: logTag)
+        let mergedProblems = try mergeProblems(
+            local: dataManager.problems,
+            server: serverBackup.problems,
+            imagePathMapping: imagePathMapping,
+            deletedItems: uniqueDeletions)
+        
+        AppLogger.info("Merging sessions...", tag: logTag)
+        let mergedSessions = try mergeSessions(
+            local: dataManager.sessions,
+            server: serverBackup.sessions,
+            deletedItems: uniqueDeletions)
+        
+        AppLogger.info("Merging attempts...", tag: logTag)
+        let mergedAttempts = try mergeAttempts(
+            local: dataManager.attempts,
+            server: serverBackup.attempts,
+            deletedItems: uniqueDeletions)
+            
+        return (mergedGyms, mergedProblems, mergedSessions, mergedAttempts, uniqueDeletions)
+    }
+    
+    private static func mergeGyms(local: [Gym], server: [BackupGym], deletedItems: [DeletedItem]) -> [Gym] {
+        var merged = local
+        let deletedGymIds = Set(deletedItems.filter { $0.type == "gym" }.map { $0.id })
+        let localGymIds = Set(local.map { $0.id.uuidString })
+        
+        merged.removeAll { deletedGymIds.contains($0.id.uuidString) }
+        
+        // Add new items from server (excluding deleted ones)
+        for serverGym in server {
+            if let serverGymConverted = try? serverGym.toGym() {
+                let localHasGym = localGymIds.contains(serverGym.id)
+                let isDeleted = deletedGymIds.contains(serverGym.id)
+                
+                if !localHasGym && !isDeleted {
+                    merged.append(serverGymConverted)
+                }
+            }
+        }
+        
+        return merged
+    }
+    
+    private static func mergeProblems(
+        local: [Problem],
+        server: [BackupProblem],
+        imagePathMapping: [String: String],
+        deletedItems: [DeletedItem]
+    ) throws -> [Problem] {
+        var merged = local
+        let deletedProblemIds = Set(deletedItems.filter { $0.type == "problem" }.map { $0.id })
+        let localProblemIds = Set(local.map { $0.id.uuidString })
+        
+        merged.removeAll { deletedProblemIds.contains($0.id.uuidString) }
+        
+        for serverProblem in server {
+            let localHasProblem = localProblemIds.contains(serverProblem.id)
+            let isDeleted = deletedProblemIds.contains(serverProblem.id)
+            
+            if !localHasProblem && !isDeleted {
+                var problemToAdd = serverProblem
+                
+                if !imagePathMapping.isEmpty, let imagePaths = serverProblem.imagePaths, !imagePaths.isEmpty {
+                    let updatedImagePaths = imagePaths.compactMap { oldPath in
+                        imagePathMapping[oldPath] ?? oldPath
+                    }
+                    if updatedImagePaths != imagePaths {
+                        problemToAdd = BackupProblem(
+                            id: serverProblem.id,
+                            gymId: serverProblem.gymId,
+                            name: serverProblem.name,
+                            description: serverProblem.description,
+                            climbType: serverProblem.climbType,
+                            difficulty: serverProblem.difficulty,
+                            tags: serverProblem.tags,
+                            location: serverProblem.location,
+                            imagePaths: updatedImagePaths,
+                            isActive: serverProblem.isActive,
+                            dateSet: serverProblem.dateSet,
+                            notes: serverProblem.notes,
+                            createdAt: serverProblem.createdAt,
+                            updatedAt: serverProblem.updatedAt
+                        )
+                    }
+                }
+                
+                if let serverProblemConverted = try? problemToAdd.toProblem() {
+                    merged.append(serverProblemConverted)
+                }
+            }
+        }
+        
+        return merged
+    }
+    
+    private static func mergeSessions(
+        local: [ClimbSession], server: [BackupClimbSession], deletedItems: [DeletedItem]
+    ) throws -> [ClimbSession] {
+        var merged = local
+        let deletedSessionIds = Set(deletedItems.filter { $0.type == "session" }.map { $0.id })
+        let localSessionIds = Set(local.map { $0.id.uuidString })
+        
+        merged.removeAll { session in
+            deletedSessionIds.contains(session.id.uuidString) && session.status != .active
+        }
+        
+        for serverSession in server {
+            let localHasSession = localSessionIds.contains(serverSession.id)
+            let isDeleted = deletedSessionIds.contains(serverSession.id)
+            
+            if !localHasSession && !isDeleted {
+                if let serverSessionConverted = try? serverSession.toClimbSession() {
+                    merged.append(serverSessionConverted)
+                }
+            }
+        }
+        
+        return merged
+    }
+    
+    private static func mergeAttempts(
+        local: [Attempt], server: [BackupAttempt], deletedItems: [DeletedItem]
+    ) throws -> [Attempt] {
+        var merged = local
+        let deletedAttemptIds = Set(deletedItems.filter { $0.type == "attempt" }.map { $0.id })
+        let localAttemptIds = Set(local.map { $0.id.uuidString })
+        
+        // Get active session IDs to protect their attempts
+        let activeSessionIds = Set(
+            local.compactMap { attempt in
+                return attempt.sessionId
+            }.filter { sessionId in
+                // Check if this session ID belongs to an active session
+                // For now, we'll be conservative and not delete attempts during merge
+                return true
+            })
+        
+        // Remove items that were deleted on other devices (but be conservative with attempts)
+        merged.removeAll { attempt in
+            deletedAttemptIds.contains(attempt.id.uuidString)
+                && !activeSessionIds.contains(attempt.sessionId)
+        }
+        
+        for serverAttempt in server {
+            let localHasAttempt = localAttemptIds.contains(serverAttempt.id)
+            let isDeleted = deletedAttemptIds.contains(serverAttempt.id)
+            
+            if !localHasAttempt && !isDeleted {
+                if let serverAttemptConverted = try? serverAttempt.toAttempt() {
+                    merged.append(serverAttemptConverted)
+                }
+            }
+        }
+        
+        return merged
+    }
+}

ios/Ascently/Services/Sync/SyncProvider.swift

@@ -0,0 +1,73 @@
+import Foundation
+
+enum SyncProviderType: String, CaseIterable, Identifiable {
+    case none
+    case server
+    case iCloud
+    
+    var id: String { rawValue }
+    var displayName: String {
+        switch self {
+        case .none: return "None"
+        case .server: return "Self-Hosted Server"
+        case .iCloud: return "iCloud"
+        }
+    }
+}
+
+protocol SyncProvider {
+    var type: SyncProviderType { get }
+    var isConfigured: Bool { get }
+    var isConnected: Bool { get }
+    
+    func sync(dataManager: ClimbingDataManager) async throws
+    func testConnection() async throws
+    func disconnect()
+}
+
+enum SyncError: LocalizedError {
+    case notConfigured
+    case notConnected
+    case invalidURL
+    case invalidResponse
+    case unauthorized
+    case badRequest
+    case serverError(Int)
+    case decodingError(Error)
+    case exportFailed
+    case importFailed(Error)
+    case imageNotFound
+    case imageUploadFailed
+    case providerError(String)
+
+    var errorDescription: String? {
+        switch self {
+        case .notConfigured:
+            return "Sync server not configured. Please set server URL and auth token."
+        case .notConnected:
+            return "Not connected to sync server. Please test connection first."
+        case .invalidURL:
+            return "Invalid server URL."
+        case .invalidResponse:
+            return "Invalid response from server."
+        case .unauthorized:
+            return "Authentication failed. Check your auth token."
+        case .badRequest:
+            return "Bad request. Check your data format."
+        case .serverError(let code):
+            return "Server error (code \(code))."
+        case .decodingError(let error):
+            return "Failed to decode response: \(error.localizedDescription)"
+        case .exportFailed:
+            return "Failed to export local data."
+        case .importFailed(let error):
+            return "Failed to import data: \(error.localizedDescription)"
+        case .imageNotFound:
+            return "Image not found on server."
+        case .imageUploadFailed:
+            return "Failed to upload image to server."
+        case .providerError(let message):
+            return "Sync provider error: \(message)"
+        }
+    }
+}

ios/Ascently/Utils/AppLogger.swift

@@ -0,0 +1,46 @@
+import Foundation
+
+/// Centralized logging utility for the iOS app.
+///
+/// All log output is automatically compiled out in non-debug builds to avoid leaking
+/// sensitive information. Use this instead of calling `print` directly.
+enum AppLogger {
+
+    enum LogLevel: String {
+        case debug = "DEBUG"
+        case info = "INFO"
+        case warning = "WARN"
+        case error = "ERROR"
+    }
+
+    static func debug(_ message: @autoclosure () -> String, tag: String = #fileID) {
+        log(level: .debug, tag: tag, message: message())
+    }
+
+    static func info(_ message: @autoclosure () -> String, tag: String = #fileID) {
+        log(level: .info, tag: tag, message: message())
+    }
+
+    static func warning(_ message: @autoclosure () -> String, tag: String = #fileID) {
+        log(level: .warning, tag: tag, message: message())
+    }
+
+    static func error(_ message: @autoclosure () -> String, tag: String = #fileID) {
+        log(level: .error, tag: tag, message: message())
+    }
+
+    static func log(level: LogLevel, tag: String, message: @autoclosure () -> String) {
+        #if DEBUG
+            let lastPath = (tag as NSString).lastPathComponent
+            let resolvedTag = lastPath.isEmpty ? tag : lastPath
+            Swift.print("[\(level.rawValue)][\(resolvedTag)] \(message())")
+        #endif
+    }
+}
+
+enum LogTag {
+    static let climbingData = "ClimbingData"
+    static let dataManagement = "DataManagementSection"
+    static let exportData = "ExportDataView"
+    static let syncSection = "SyncSection"
+}

ios/Ascently/Utils/DataStateManager.swift

@@ -18,14 +18,17 @@ class DataStateManager {
     private init() {
         // Initialize with current timestamp if this is the first time
         if !isInitialized() {
-            print("DataStateManager: First time initialization")
+            AppLogger.info("DataStateManager: First time initialization", tag: "DataState")
             // Set initial timestamp to a very old date so server data will be considered newer
             let epochTime = "1970-01-01T00:00:00.000Z"
             userDefaults.set(epochTime, forKey: Keys.lastModified)
             markAsInitialized()
-            print("DataStateManager initialized with epoch timestamp: \(epochTime)")
+            AppLogger.info(
+                "DataStateManager initialized with epoch timestamp: \(epochTime)", tag: "DataState")
         } else {
-            print("DataStateManager: Already initialized, current timestamp: \(getLastModified())")
+            AppLogger.info(
+                "DataStateManager: Already initialized, current timestamp: \(getLastModified())",
+                tag: "DataState")
         }
     }
 
@@ -34,29 +37,32 @@ class DataStateManager {
     func updateDataState() {
         let now = ISO8601DateFormatter().string(from: Date())
         userDefaults.set(now, forKey: Keys.lastModified)
-        print("iOS Data state updated to: \(now)")
+        AppLogger.info("iOS Data state updated to: \(now)", tag: "DataState")
     }
 
     func getLastModified() -> String {
         if let storedTimestamp = userDefaults.string(forKey: Keys.lastModified) {
-            print("iOS DataStateManager returning stored timestamp: \(storedTimestamp)")
+            AppLogger.debug(
+                "iOS DataStateManager returning stored timestamp: \(storedTimestamp)",
+                tag: "DataState")
             return storedTimestamp
         }
 
         let epochTime = "1970-01-01T00:00:00.000Z"
-        print("No data state timestamp found - returning epoch time: \(epochTime)")
+        AppLogger.warning(
+            "No data state timestamp found - returning epoch time: \(epochTime)", tag: "DataState")
         return epochTime
     }
 
     func setLastModified(_ timestamp: String) {
         userDefaults.set(timestamp, forKey: Keys.lastModified)
-        print("Data state set to: \(timestamp)")
+        AppLogger.info("Data state set to: \(timestamp)", tag: "DataState")
     }
 
     func reset() {
         userDefaults.removeObject(forKey: Keys.lastModified)
         userDefaults.removeObject(forKey: Keys.initialized)
-        print("Data state reset")
+        AppLogger.info("Data state reset", tag: "DataState")
     }
 
     private func isInitialized() -> Bool {

ios/Ascently/Utils/ImageManager.swift

@@ -5,6 +5,7 @@ import UIKit
 
 class ImageManager {
     static let shared = ImageManager()
+    private let logTag = "ImageManager"
 
     private let thumbnailCache = NSCache<NSString, UIImage>()
     private let fileManager = FileManager.default
@@ -30,7 +31,7 @@ class ImageManager {
 
         // Final integrity check
         if !validateStorageIntegrity() {
-            print("CRITICAL: Storage integrity compromised - attempting emergency recovery")
+            logError("CRITICAL: Storage integrity compromised - attempting emergency recovery")
             emergencyImageRestore()
         }
 
@@ -83,7 +84,7 @@ class ImageManager {
             return
         }
 
-        print("🔄 Migrating images from OpenClimb to Ascently directory...")
+        logInfo("🔄 Migrating images from OpenClimb to Ascently directory...")
 
         do {
             // Create parent directory if needed
@@ -94,16 +95,16 @@ class ImageManager {
 
             // Move the entire directory
             try fileManager.moveItem(at: legacyDir, to: appSupportDirectory)
-            print("Successfully migrated image directory from OpenClimb to Ascently")
+            logInfo("Successfully migrated image directory from OpenClimb to Ascently")
         } catch {
-            print("❌ Failed to migrate image directory: \(error)")
+            logError("Failed to migrate image directory: \(error)")
             // If move fails, try to copy instead
             do {
                 try fileManager.copyItem(at: legacyDir, to: appSupportDirectory)
-                print("Successfully copied image directory from OpenClimb to Ascently")
+                logInfo("Successfully copied image directory from OpenClimb to Ascently")
                 // Don't remove the old directory in case of issues
             } catch {
-                print("❌ Failed to copy image directory: \(error)")
+                logError("Failed to copy image directory: \(error)")
             }
         }
     }
@@ -122,9 +123,9 @@ class ImageManager {
                         attributes: [
                             .protectionKey: FileProtectionType.completeUntilFirstUserAuthentication
                         ])
-                    print("Created directory: \(directory.path)")
+                    logInfo("Created directory: \(directory.path)")
                 } catch {
-                    print("ERROR: Failed to create directory \(directory.path): \(error)")
+                    logError("ERROR: Failed to create directory \(directory.path): \(error)")
                 }
             }
         }
@@ -141,9 +142,9 @@ class ImageManager {
             var backupURL = backupDirectory
             try imagesURL.setResourceValues(resourceValues)
             try backupURL.setResourceValues(resourceValues)
-            print("Excluded image directories from iCloud backup")
+            logInfo("Excluded image directories from iCloud backup")
         } catch {
-            print("WARNING: Failed to exclude from iCloud backup: \(error)")
+            logWarning("WARNING: Failed to exclude from iCloud backup: \(error)")
         }
     }
 
@@ -167,11 +168,11 @@ class ImageManager {
     }
 
     private func performRobustMigration() {
-        print("Starting robust image migration system...")
+        logInfo("Starting robust image migration system...")
 
         // Check for interrupted migration
         if let incompleteState = loadMigrationState() {
-            print("Detected interrupted migration, resuming...")
+            logInfo("Detected interrupted migration, resuming...")
             resumeMigration(from: incompleteState)
         } else {
             // Start fresh migration
@@ -188,7 +189,7 @@ class ImageManager {
     private func startNewMigration() {
         // First check for images in previous Application Support directories
         if let previousAppSupportImages = findPreviousAppSupportImages() {
-            print("Found images in previous Application Support directory")
+            logInfo("Found images in previous Application Support directory")
             migratePreviousAppSupportImages(from: previousAppSupportImages)
             return
         }
@@ -198,7 +199,7 @@ class ImageManager {
         let hasLegacyImportImages = fileManager.fileExists(atPath: legacyImportImagesDirectory.path)
 
         guard hasLegacyImages || hasLegacyImportImages else {
-            print("No legacy images to migrate")
+            logInfo("No legacy images to migrate")
             return
         }
 
@@ -213,7 +214,7 @@ class ImageManager {
                 let legacyFiles = try fileManager.contentsOfDirectory(
                     atPath: legacyImagesDirectory.path)
                 allLegacyFiles.append(contentsOf: legacyFiles)
-                print("Found \(legacyFiles.count) images in OpenClimbImages")
+                logInfo("Found \(legacyFiles.count) images in OpenClimbImages")
             }
 
             // Collect files from Documents/images directory
@@ -221,10 +222,10 @@ class ImageManager {
                 let importFiles = try fileManager.contentsOfDirectory(
                     atPath: legacyImportImagesDirectory.path)
                 allLegacyFiles.append(contentsOf: importFiles)
-                print("Found \(importFiles.count) images in Documents/images")
+                logInfo("Found \(importFiles.count) images in Documents/images")
             }
 
-            print("Total legacy images to migrate: \(allLegacyFiles.count)")
+            logInfo("Total legacy images to migrate: \(allLegacyFiles.count)")
 
             let initialState = MigrationState(
                 version: MigrationState.currentVersion,
@@ -239,24 +240,24 @@ class ImageManager {
             performMigrationWithCheckpoints(files: allLegacyFiles, currentState: initialState)
 
         } catch {
-            print("ERROR: Failed to start migration: \(error)")
+            logError("ERROR: Failed to start migration: \(error)")
         }
     }
 
     private func resumeMigration(from state: MigrationState) {
-        print("Resuming migration from checkpoint...")
-        print("Progress: \(state.completedFiles.count)/\(state.totalFiles)")
+        logInfo("Resuming migration from checkpoint...")
+        logInfo("Progress: \(state.completedFiles.count)/\(state.totalFiles)")
 
         do {
             let legacyFiles = try fileManager.contentsOfDirectory(
                 atPath: legacyImagesDirectory.path)
             let remainingFiles = legacyFiles.filter { !state.completedFiles.contains($0) }
 
-            print("Resuming with \(remainingFiles.count) remaining files")
+            logInfo("Resuming with \(remainingFiles.count) remaining files")
             performMigrationWithCheckpoints(files: remainingFiles, currentState: state)
 
         } catch {
-            print("ERROR: Failed to resume migration: \(error)")
+            logError("ERROR: Failed to resume migration: \(error)")
             // Fallback: start fresh
             removeMigrationState()
             startNewMigration()
@@ -323,11 +324,11 @@ class ImageManager {
                     completedFiles.append(fileName)
                     migratedCount += 1
 
-                    print("Migrated: \(fileName) (\(migratedCount)/\(currentState.totalFiles))")
+                    logInfo("Migrated: \(fileName) (\(migratedCount)/\(currentState.totalFiles))")
 
                 } catch {
                     failedCount += 1
-                    print("ERROR: Failed to migrate \(fileName): \(error)")
+                    logError("ERROR: Failed to migrate \(fileName): \(error)")
                 }
 
                 // Save checkpoint every 5 files or if interrupted
@@ -341,7 +342,7 @@ class ImageManager {
                         lastCheckpoint: Date()
                     )
                     saveMigrationState(checkpointState)
-                    print("Checkpoint saved: \(completedFiles.count)/\(currentState.totalFiles)")
+                    logInfo("Checkpoint saved: \(completedFiles.count)/\(currentState.totalFiles)")
                 }
             }
         }
@@ -357,7 +358,7 @@ class ImageManager {
         )
         saveMigrationState(finalState)
 
-        print("Migration complete: \(migratedCount) migrated, \(failedCount) failed")
+        logInfo("Migration complete: \(migratedCount) migrated, \(failedCount) failed")
 
         // Clean up legacy directory if no failures
         if failedCount == 0 {
@@ -366,7 +367,7 @@ class ImageManager {
     }
 
     private func verifyMigrationIntegrity() {
-        print("Verifying migration integrity...")
+        logInfo("Verifying migration integrity...")
 
         var allLegacyFiles = Set<String>()
 
@@ -384,12 +385,12 @@ class ImageManager {
                 allLegacyFiles.formUnion(importFiles)
             }
         } catch {
-            print("ERROR: Failed to read legacy directories: \(error)")
+            logError("ERROR: Failed to read legacy directories: \(error)")
             return
         }
 
         guard !allLegacyFiles.isEmpty else {
-            print("No legacy directories to verify against")
+            logInfo("No legacy directories to verify against")
             return
         }
 
@@ -400,10 +401,10 @@ class ImageManager {
             let missingFiles = allLegacyFiles.subtracting(migratedFiles)
 
             if missingFiles.isEmpty {
-                print("Migration integrity verified - all files present")
+                logInfo("Migration integrity verified - all files present")
                 cleanupLegacyDirectory()
             } else {
-                print("WARNING: Missing \(missingFiles.count) files, re-triggering migration")
+                logWarning("WARNING: Missing \(missingFiles.count) files, re-triggering migration")
                 // Re-trigger migration for missing files
                 performMigrationWithCheckpoints(
                     files: Array(missingFiles),
@@ -417,16 +418,16 @@ class ImageManager {
                     ))
             }
         } catch {
-            print("ERROR: Failed to verify migration integrity: \(error)")
+            logError("ERROR: Failed to verify migration integrity: \(error)")
         }
     }
 
     private func cleanupLegacyDirectory() {
         do {
             try fileManager.removeItem(at: legacyImagesDirectory)
-            print("Cleaned up legacy directory")
+            logInfo("Cleaned up legacy directory")
         } catch {
-            print("WARNING: Failed to clean up legacy directory: \(error)")
+            logWarning("WARNING: Failed to clean up legacy directory: \(error)")
         }
     }
 
@@ -446,16 +447,16 @@ class ImageManager {
             let data = try Data(contentsOf: migrationStateURL)
             let state = try JSONDecoder().decode(MigrationState.self, from: data)
 
-            // Check if state is too old (more than 1 hour)
+            // Check if state is too old
             if Date().timeIntervalSince(state.lastCheckpoint) > 3600 {
-                print("WARNING: Migration state is stale, starting fresh")
+                logWarning("WARNING: Migration state is stale, starting fresh")
                 removeMigrationState()
                 return nil
             }
 
             return state.isComplete ? nil : state
         } catch {
-            print("ERROR: Failed to load migration state: \(error)")
+            logError("ERROR: Failed to load migration state: \(error)")
             removeMigrationState()
             return nil
         }
@@ -466,7 +467,7 @@ class ImageManager {
             let data = try JSONEncoder().encode(state)
             try data.write(to: migrationStateURL)
         } catch {
-            print("ERROR: Failed to save migration state: \(error)")
+            logError("ERROR: Failed to save migration state: \(error)")
         }
     }
 
@@ -482,7 +483,7 @@ class ImageManager {
     private func cleanupMigrationState() {
         try? fileManager.removeItem(at: migrationStateURL)
         try? fileManager.removeItem(at: migrationLockURL)
-        print("Cleaned up migration state files")
+        logInfo("Cleaned up migration state files")
     }
 
     func saveImageData(_ data: Data, withName name: String? = nil) -> String? {
@@ -497,10 +498,10 @@ class ImageManager {
             // Create backup copy
             try data.write(to: backupPath)
 
-            print("Saved image with backup: \(fileName)")
+            logInfo("Saved image with backup: \(fileName)")
             return fileName
         } catch {
-            print("ERROR: Failed to save image \(fileName): \(error)")
+            logError("ERROR: Failed to save image \(fileName): \(error)")
             return nil
         }
     }
@@ -520,7 +521,7 @@ class ImageManager {
         if fileManager.fileExists(atPath: backupPath.path),
             let data = try? Data(contentsOf: backupPath)
         {
-            print("Restored image from backup: \(path)")
+            logInfo("Restored image from backup: \(path)")
 
             // Restore to primary location
             try? data.write(to: URL(fileURLWithPath: primaryPath))
@@ -595,7 +596,7 @@ class ImageManager {
             do {
                 try fileManager.removeItem(atPath: primaryPath)
             } catch {
-                print("ERROR: Failed to delete primary image at \(primaryPath): \(error)")
+                logError("ERROR: Failed to delete primary image at \(primaryPath): \(error)")
                 success = false
             }
         }
@@ -605,7 +606,7 @@ class ImageManager {
             do {
                 try fileManager.removeItem(at: backupPath)
             } catch {
-                print("ERROR: Failed to delete backup image at \(backupPath.path): \(error)")
+                logError("ERROR: Failed to delete backup image at \(backupPath.path): \(error)")
                 success = false
             }
         }
@@ -642,7 +643,7 @@ class ImageManager {
     }
 
     func performMaintenance() {
-        print("Starting image maintenance...")
+        logInfo("Starting image maintenance...")
 
         syncBackups()
         validateImageIntegrity()
@@ -660,11 +661,11 @@ class ImageManager {
                     let backupPath = backupDirectory.appendingPathComponent(fileName)
 
                     try? fileManager.copyItem(at: primaryPath, to: backupPath)
-                    print("Created missing backup for: \(fileName)")
+                    logInfo("Created missing backup for: \(fileName)")
                 }
             }
         } catch {
-            print("ERROR: Failed to sync backups: \(error)")
+            logError("ERROR: Failed to sync backups: \(error)")
         }
     }
 
@@ -683,14 +684,14 @@ class ImageManager {
                 }
             }
 
-            print("Validated \(validFiles) of \(files.count) image files")
+            logInfo("Validated \(validFiles) of \(files.count) image files")
         } catch {
-            print("ERROR: Failed to validate images: \(error)")
+            logError("ERROR: Failed to validate images: \(error)")
         }
     }
 
     private func cleanupOrphanedFiles() {
-        print("Cleanup would require coordination with data manager")
+        logInfo("Cleanup would require coordination with data manager")
     }
 
     func getStorageInfo() -> (primaryCount: Int, backupCount: Int, totalSize: Int64) {
@@ -718,7 +719,7 @@ class ImageManager {
     private func logDirectoryInfo() {
         let info = getStorageInfo()
         let previousDir = findPreviousAppSupportImages()
-        print(
+        logInfo(
             """
             Ascently Image Storage:
             - App Support: \(appSupportDirectory.path)
@@ -732,7 +733,7 @@ class ImageManager {
     }
 
     func forceRecoveryMigration() {
-        print("FORCE RECOVERY: Starting manual migration recovery...")
+        logInfo("FORCE RECOVERY: Starting manual migration recovery...")
 
         // Remove any stale state
         removeMigrationState()
@@ -741,7 +742,7 @@ class ImageManager {
         // Force fresh migration
         startNewMigration()
 
-        print("FORCE RECOVERY: Migration recovery completed")
+        logInfo("FORCE RECOVERY: Migration recovery completed")
     }
 
     func saveImportedImage(_ imageData: Data, filename: String) throws -> String {
@@ -754,12 +755,12 @@ class ImageManager {
         // Create backup
         try? imageData.write(to: backupPath)
 
-        print("Imported image: \(filename)")
+        logInfo("Imported image: \(filename)")
         return filename
     }
 
     func emergencyImageRestore() {
-        print("EMERGENCY: Attempting image restoration...")
+        logError("EMERGENCY: Attempting image restoration...")
 
         // Try to restore from backup directory
         do {
@@ -777,14 +778,14 @@ class ImageManager {
                 }
             }
 
-            print("EMERGENCY: Restored \(restoredCount) images from backup")
+            logError("EMERGENCY: Restored \(restoredCount) images from backup")
         } catch {
-            print("EMERGENCY: Failed to restore from backup: \(error)")
+            logError("EMERGENCY: Failed to restore from backup: \(error)")
         }
 
         // Try previous Application Support directories first
         if let previousAppSupportImages = findPreviousAppSupportImages() {
-            print("EMERGENCY: Found previous Application Support images, migrating...")
+            logError("EMERGENCY: Found previous Application Support images, migrating...")
             migratePreviousAppSupportImages(from: previousAppSupportImages)
             return
         }
@@ -793,23 +794,21 @@ class ImageManager {
         if fileManager.fileExists(atPath: legacyImagesDirectory.path)
             || fileManager.fileExists(atPath: legacyImportImagesDirectory.path)
         {
-            print("EMERGENCY: Attempting legacy migration as fallback...")
+            logError("EMERGENCY: Attempting legacy migration as fallback...")
             forceRecoveryMigration()
         }
     }
 
     func debugSafeInitialization() -> Bool {
-        print("DEBUG SAFE: Performing debug-safe initialization check...")
+        logDebug("DEBUG SAFE: Performing debug-safe initialization check...")
 
         // Check if we're in a debug environment
         #if DEBUG
-            print("DEBUG SAFE: Debug environment detected")
+            logDebug("DEBUG SAFE: Debug environment detected")
 
-            // Check for interrupted migration more aggressively
             if fileManager.fileExists(atPath: migrationLockURL.path) {
-                print("DEBUG SAFE: Found migration lock - likely debug interruption")
+                logDebug("DEBUG SAFE: Found migration lock - likely debug interruption")
 
-                // Give extra time for file system to stabilize
                 Thread.sleep(forTimeInterval: 1.0)
 
                 // Try emergency recovery
@@ -829,14 +828,14 @@ class ImageManager {
             ((try? fileManager.contentsOfDirectory(atPath: backupDirectory.path)) ?? []).count > 0
 
         if primaryEmpty && backupHasFiles {
-            print("DEBUG SAFE: Primary empty but backup exists - restoring")
+            logDebug("DEBUG SAFE: Primary empty but backup exists - restoring")
             emergencyImageRestore()
             return true
         }
 
         // Check if primary storage is empty but previous Application Support images exist
         if primaryEmpty, let previousAppSupportImages = findPreviousAppSupportImages() {
-            print("DEBUG SAFE: Primary empty but found previous Application Support images")
+            logDebug("DEBUG SAFE: Primary empty but found previous Application Support images")
             migratePreviousAppSupportImages(from: previousAppSupportImages)
             return true
         }
@@ -852,7 +851,7 @@ class ImageManager {
 
         // Check if we have more backups than primary files (sign of corruption)
         if backupFiles.count > primaryFiles.count + 5 {
-            print(
+            logInfo(
                 "WARNING INTEGRITY: Backup count significantly exceeds primary - potential corruption"
             )
             return false
@@ -860,7 +859,7 @@ class ImageManager {
 
         // Check if primary is completely empty but we have data elsewhere
         if primaryFiles.isEmpty && !backupFiles.isEmpty {
-            print("WARNING INTEGRITY: Primary storage empty but backups exist")
+            logWarning("WARNING INTEGRITY: Primary storage empty but backups exist")
             return false
         }
 
@@ -874,7 +873,7 @@ class ImageManager {
                 for: .applicationSupportDirectory, in: .userDomainMask
             ).first
         else {
-            print("ERROR: Could not access Application Support directory")
+            logError("ERROR: Could not access Application Support directory")
             return nil
         }
 
@@ -908,13 +907,13 @@ class ImageManager {
                 }
             }
         } catch {
-            print("ERROR: Error scanning for previous Application Support directories: \(error)")
+            logError("ERROR: Error scanning for previous Application Support directories: \(error)")
         }
         return nil
     }
 
     private func migratePreviousAppSupportImages(from sourceDirectory: URL) {
-        print("Migrating images from previous Application Support directory")
+        logInfo("Migrating images from previous Application Support directory")
 
         do {
             let imageFiles = try fileManager.contentsOfDirectory(atPath: sourceDirectory.path)
@@ -937,18 +936,33 @@ class ImageManager {
                         // Create backup
                         try? fileManager.copyItem(at: sourcePath, to: backupPath)
 
-                        print("Migrated: \(fileName)")
+                        logInfo("Migrated: \(fileName)")
                     } catch {
-                        print("ERROR: Failed to migrate \(fileName): \(error)")
+                        logError("ERROR: Failed to migrate \(fileName): \(error)")
                     }
                 }
             }
 
-            print("Completed migration from previous Application Support directory")
+            logInfo("Completed migration from previous Application Support directory")
 
         } catch {
-            print("ERROR: Failed to migrate from previous Application Support: \(error)")
+            logError("ERROR: Failed to migrate from previous Application Support: \(error)")
         }
     }
 
+    private func logInfo(_ message: String) {
+        AppLogger.info(message, tag: logTag)
+    }
+
+    private func logWarning(_ message: String) {
+        AppLogger.warning(message, tag: logTag)
+    }
+
+    private func logError(_ message: String) {
+        AppLogger.error(message, tag: logTag)
+    }
+
+    private func logDebug(_ message: String) {
+        AppLogger.debug(message, tag: logTag)
+    }
 }

ios/Ascently/Utils/ThemeManager.swift

@@ -0,0 +1,77 @@
+import SwiftUI
+import Combine
+
+class ThemeManager: ObservableObject {
+    @Published var accentColor: Color = .blue {
+        didSet {
+            saveColor()
+        }
+    }
+    
+    private let userDefaultsKey = "accentColorData"
+    
+    init() {
+        loadColor()
+    }
+    
+    private func loadColor() {
+        guard let data = UserDefaults.standard.data(forKey: userDefaultsKey) else {
+            self.accentColor = .blue
+            return
+        }
+        
+        do {
+            if let uiColor = try NSKeyedUnarchiver.unarchivedObject(ofClass: UIColor.self, from: data) {
+                self.accentColor = Color(uiColor)
+            }
+        } catch {
+            print("Failed to load accent color: \(error)")
+            self.accentColor = .blue
+        }
+    }
+    
+    private func saveColor() {
+        do {
+            let uiColor = UIColor(accentColor)
+            let data = try NSKeyedArchiver.archivedData(withRootObject: uiColor, requiringSecureCoding: false)
+            UserDefaults.standard.set(data, forKey: userDefaultsKey)
+        } catch {
+            print("Failed to save accent color: \(error)")
+        }
+    }
+    
+    func resetToDefault() {
+        accentColor = .blue
+    }
+    
+    // Curated list of preset colors that maintain good contrast
+    static let presetColors: [Color] = [
+        .blue,      // Default Blue
+        .purple,    // Purple
+        .pink,      // Pink
+        .red,       // Red
+        .orange,    // Orange
+        .green,     // Green
+        .teal,      // Teal
+        .indigo,    // Indigo
+        .mint,      // Mint
+        Color(uiColor: .systemBrown), // Brown
+        Color(uiColor: .systemCyan)   // Cyan
+    ]
+    
+    var contrastingTextColor: Color {
+        let uiColor = UIColor(accentColor)
+        var red: CGFloat = 0
+        var green: CGFloat = 0
+        var blue: CGFloat = 0
+        var alpha: CGFloat = 0
+        
+        uiColor.getRed(&red, green: &green, blue: &blue, alpha: &alpha)
+        
+        // Calculate relative luminance
+        let luminance = 0.299 * red + 0.587 * green + 0.114 * blue
+        
+        // Return black for light colors, white for dark colors
+        return luminance > 0.5 ? .black : .white
+    }
+}

ios/Ascently/Utils/ZipUtils.swift

@@ -4,6 +4,8 @@ import zlib
 
 struct ZipUtils {
 
+    private static let logTag = "ZipUtils"
+
     private static let DATA_JSON_FILENAME = "data.json"
     private static let IMAGES_DIR_NAME = "images"
     private static let METADATA_FILENAME = "metadata.txt"
@@ -49,7 +51,7 @@ struct ZipUtils {
         )
 
         // Process images in batches for better performance
-        print("Processing \(referencedImagePaths.count) images for export")
+        logInfo("Processing \(referencedImagePaths.count) images for export")
         var successfulImages = 0
         let batchSize = 10
         let sortedPaths = Array(referencedImagePaths).sorted()
@@ -59,7 +61,7 @@ struct ZipUtils {
 
         for (index, imagePath) in sortedPaths.enumerated() {
             if index % batchSize == 0 {
-                print("Processing images \(index)/\(sortedPaths.count)")
+                logInfo("Processing images \(index)/\(sortedPaths.count)")
             }
 
             let imageURL = URL(fileURLWithPath: imagePath)
@@ -83,11 +85,11 @@ struct ZipUtils {
                     successfulImages += 1
                 }
             } catch {
-                print("Failed to read image: \(imageName)")
+                logWarning("Failed to read image: \(imageName)")
             }
         }
 
-        print("Export: included \(successfulImages)/\(referencedImagePaths.count) images")
+        logInfo("Export: included \(successfulImages)/\(referencedImagePaths.count) images")
 
         // Build central directory
         centralDirectory.reserveCapacity(fileEntries.count * 100)  // Estimate 100 bytes per entry
@@ -114,7 +116,7 @@ struct ZipUtils {
     }
 
     static func extractImportZip(data: Data) throws -> ImportResult {
-        print("Starting ZIP extraction - data size: \(data.count) bytes")
+        logInfo("Starting ZIP extraction - data size: \(data.count) bytes")
 
         return try extractUsingCustomParser(data: data)
     }
@@ -127,10 +129,10 @@ struct ZipUtils {
         let zipEntries: [ZipEntry]
         do {
             zipEntries = try parseZipFile(data: data)
-            print("Successfully parsed ZIP file with \(zipEntries.count) entries")
+            logInfo("Successfully parsed ZIP file with \(zipEntries.count) entries")
         } catch {
-            print("Failed to parse ZIP file: \(error)")
-            print(
+            logError("Failed to parse ZIP file: \(error)")
+            logError(
                 "ZIP data header: \(data.prefix(20).map { String(format: "%02X", $0) }.joined(separator: " "))"
             )
             throw NSError(
@@ -142,24 +144,24 @@ struct ZipUtils {
             )
         }
 
-        print("Found \(zipEntries.count) entries in ZIP file:")
+        logInfo("Found \(zipEntries.count) entries in ZIP file:")
         for entry in zipEntries {
-            print("  - \(entry.filename) (size: \(entry.data.count) bytes)")
+            logInfo("  - \(entry.filename) (size: \(entry.data.count) bytes)")
         }
 
         for entry in zipEntries {
             switch entry.filename {
             case METADATA_FILENAME:
                 metadataContent = String(data: entry.data, encoding: .utf8) ?? ""
-                print("Found metadata: \(metadataContent.prefix(100))...")
+                logInfo("Found metadata: \(metadataContent.prefix(100))...")
 
             case DATA_JSON_FILENAME:
                 jsonContent = String(data: entry.data, encoding: .utf8) ?? ""
-                print("Found data.json with \(jsonContent.count) characters")
+                logInfo("Found data.json with \(jsonContent.count) characters")
                 if jsonContent.isEmpty {
-                    print("WARNING: data.json is empty!")
+                    logWarning("WARNING: data.json is empty!")
                 } else {
-                    print("data.json preview: \(jsonContent.prefix(200))...")
+                    logInfo("data.json preview: \(jsonContent.prefix(200))...")
                 }
 
             default:
@@ -173,17 +175,17 @@ struct ZipUtils {
                             entry.data, filename: originalFilename)
                         importedImagePaths[originalFilename] = filename
                     } catch {
-                        print("Failed to import image \(originalFilename): \(error)")
+                        logError("Failed to import image \(originalFilename): \(error)")
                     }
                 }
             }
         }
 
         guard !jsonContent.isEmpty else {
-            print("ERROR: data.json not found or empty")
-            print("Available files in ZIP:")
+            logError("ERROR: data.json not found or empty")
+            logInfo("Available files in ZIP:")
             for entry in zipEntries {
-                print("  - \(entry.filename)")
+                logInfo("  - \(entry.filename)")
             }
             throw NSError(
                 domain: "ImportError", code: 1,
@@ -194,13 +196,25 @@ struct ZipUtils {
             )
         }
 
-        print("Import extraction completed: \(importedImagePaths.count) images processed")
+        logInfo("Import extraction completed: \(importedImagePaths.count) images processed")
 
         return ImportResult(
             jsonData: jsonContent.data(using: .utf8) ?? Data(), imagePathMapping: importedImagePaths
         )
     }
 
+    private static func logInfo(_ message: String) {
+        AppLogger.info(message, tag: logTag)
+    }
+
+    private static func logWarning(_ message: String) {
+        AppLogger.warning(message, tag: logTag)
+    }
+
+    private static func logError(_ message: String) {
+        AppLogger.error(message, tag: logTag)
+    }
+
     private static func createMetadata(
         exportData: ClimbDataBackup,
         referencedImagePaths: Set<String>

ios/Ascently/ViewModels/ClimbingDataManager.swift

@@ -15,6 +15,8 @@ import UniformTypeIdentifiers
 @MainActor
 class ClimbingDataManager: ObservableObject {
 
+    static let shared = ClimbingDataManager()
+
     @Published var gyms: [Gym] = []
     @Published var problems: [Problem] = []
     @Published var sessions: [ClimbSession] = []
@@ -38,7 +40,6 @@ class ClimbingDataManager: ObservableObject {
     let healthKitService = HealthKitService.shared
 
     @Published var isSyncing = false
-
     private enum Keys {
         static let gyms = "ascently_gyms"
         static let problems = "ascently_problems"
@@ -79,7 +80,7 @@ class ClimbingDataManager: ObservableObject {
         let name: String
     }
 
-    init() {
+    fileprivate init() {
         _ = ImageManager.shared
         migrateFromOpenClimbIfNeeded()
         loadAllData()
@@ -115,7 +116,8 @@ class ClimbingDataManager: ObservableObject {
             return
         }
 
-        print("Starting migration from OpenClimb to Ascently keys...")
+        AppLogger.info(
+            "Starting migration from OpenClimb to Ascently keys...", tag: LogTag.climbingData)
         var migrationCount = 0
 
         // Migrate each data type if it exists in old format but not in new format
@@ -135,7 +137,7 @@ class ClimbingDataManager: ObservableObject {
                 userDefaults.set(oldData, forKey: newKey)
                 userDefaults.removeObject(forKey: oldKey)
                 migrationCount += 1
-                print("✅ Migrated: \(oldKey) → \(newKey)")
+                AppLogger.info("Migrated: \(oldKey) → \(newKey)", tag: LogTag.climbingData)
             }
         }
 
@@ -147,7 +149,8 @@ class ClimbingDataManager: ObservableObject {
                 {
                     sharedDefaults.set(oldData, forKey: newKey)
                     sharedDefaults.removeObject(forKey: oldKey)
-                    print("✅ Migrated shared: \(oldKey) → \(newKey)")
+                    AppLogger.info(
+                        "Migrated shared: \(oldKey) → \(newKey)", tag: LogTag.climbingData)
                 }
             }
         }
@@ -161,18 +164,19 @@ class ClimbingDataManager: ObservableObject {
             userDefaults.set(lastModified, forKey: newDataStateKey)
             userDefaults.removeObject(forKey: legacyDataStateKey)
             migrationCount += 1
-            print("✅ Migrated data state timestamp")
+            AppLogger.info("Migrated data state timestamp", tag: LogTag.climbingData)
         }
 
         // Mark migration as completed
         userDefaults.set(true, forKey: migrationKey)
 
         if migrationCount > 0 {
-            print(
-                "Migration completed! Migrated \(migrationCount) data items from OpenClimb to Ascently"
+            AppLogger.info(
+                "Migration completed! Migrated \(migrationCount) data items from OpenClimb to Ascently",
+                tag: LogTag.climbingData
             )
         } else {
-            print("No OpenClimb data found to migrate")
+            AppLogger.info("No OpenClimb data found to migrate", tag: LogTag.climbingData)
         }
     }
 
@@ -413,9 +417,16 @@ class ClimbingDataManager: ObservableObject {
     }
 
     func startSession(gymId: UUID, notes: String? = nil) {
-        // End any currently active session
+        Task { @MainActor in
+            await startSessionAsync(gymId: gymId, notes: notes)
+        }
+    }
+
+    @discardableResult
+    func startSessionAsync(gymId: UUID, notes: String? = nil) async -> ClimbSession? {
+        // End any currently active session before starting a new one
         if let currentActive = activeSession {
-            endSession(currentActive.id)
+            await endSessionAsync(currentActive.id)
         }
 
         let newSession = ClimbSession(gymId: gymId, notes: notes)
@@ -428,60 +439,70 @@ class ClimbingDataManager: ObservableObject {
 
         // MARK: - Start Live Activity for new session
         if let gym = gym(withId: gymId) {
-            Task {
-                await LiveActivityManager.shared.startLiveActivity(
-                    for: newSession, gymName: gym.name)
-            }
+            await LiveActivityManager.shared.startLiveActivity(
+                for: newSession,
+                gymName: gym.name)
         }
 
         if healthKitService.isEnabled {
-            Task {
-                do {
-                    try await healthKitService.startWorkout(
-                        startDate: newSession.startTime ?? Date(),
-                        sessionId: newSession.id)
-                } catch {
-                    print("Failed to start HealthKit workout: \(error.localizedDescription)")
-                }
+            do {
+                try await healthKitService.startWorkout(
+                    startDate: newSession.startTime ?? Date(),
+                    sessionId: newSession.id)
+            } catch {
+                AppLogger.error(
+                    "Failed to start HealthKit workout: \(error.localizedDescription)",
+                    tag: LogTag.climbingData)
             }
         }
+
+        return newSession
     }
 
     func endSession(_ sessionId: UUID) {
-        if let session = sessions.first(where: { $0.id == sessionId && $0.status == .active }),
+        Task { @MainActor in
+            await endSessionAsync(sessionId)
+        }
+    }
+
+    @discardableResult
+    func endSessionAsync(_ sessionId: UUID) async -> ClimbSession? {
+        guard
+            let session = sessions.first(where: { $0.id == sessionId && $0.status == .active }),
             let index = sessions.firstIndex(where: { $0.id == sessionId })
-        {
+        else {
+            return nil
+        }
 
-            let completedSession = session.completed()
-            sessions[index] = completedSession
+        let completedSession = session.completed()
+        sessions[index] = completedSession
 
-            if activeSession?.id == sessionId {
-                activeSession = nil
-            }
+        if activeSession?.id == sessionId {
+            activeSession = nil
+        }
 
-            saveActiveSession()
-            saveSessions()
-            DataStateManager.shared.updateDataState()
+        saveActiveSession()
+        saveSessions()
+        DataStateManager.shared.updateDataState()
 
-            // Trigger auto-sync if enabled
-            syncService.triggerAutoSync(dataManager: self)
+        // Trigger auto-sync if enabled
+        syncService.triggerAutoSync(dataManager: self)
 
-            // MARK: - End Live Activity after session ends
-            Task {
-                await LiveActivityManager.shared.endLiveActivity()
-            }
+        // MARK: - End Live Activity after session ends
+        await LiveActivityManager.shared.endLiveActivity()
 
-            if healthKitService.isEnabled {
-                Task {
-                    do {
-                        try await healthKitService.endWorkout(
-                            endDate: completedSession.endTime ?? Date())
-                    } catch {
-                        print("Failed to end HealthKit workout: \(error.localizedDescription)")
-                    }
-                }
+        if healthKitService.isEnabled {
+            do {
+                try await healthKitService.endWorkout(
+                    endDate: completedSession.endTime ?? Date())
+            } catch {
+                AppLogger.error(
+                    "Failed to end HealthKit workout: \(error.localizedDescription)",
+                    tag: LogTag.climbingData)
             }
         }
+
+        return completedSession
     }
 
     func updateSession(_ session: ClimbSession) {
@@ -667,7 +688,9 @@ class ClimbingDataManager: ObservableObject {
         }
 
         if !orphanedAttempts.isEmpty {
-            print("🧹 Cleaning up \(orphanedAttempts.count) orphaned attempts")
+            AppLogger.info(
+                "🧹 Cleaning up \(orphanedAttempts.count) orphaned attempts",
+                tag: LogTag.climbingData)
 
             // Track these as deleted to prevent sync from re-introducing them
             for attempt in orphanedAttempts {
@@ -693,14 +716,15 @@ class ClimbingDataManager: ObservableObject {
 
             if seenAttempts.contains(key) {
                 duplicateIds.append(attempt.id)
-                print("🧹 Found duplicate attempt: \(attempt.id)")
+                AppLogger.info("🧹 Found duplicate attempt: \(attempt.id)", tag: LogTag.climbingData)
             } else {
                 seenAttempts.insert(key)
             }
         }
 
         if !duplicateIds.isEmpty {
-            print("🧹 Removing \(duplicateIds.count) duplicate attempts")
+            AppLogger.info(
+                "🧹 Removing \(duplicateIds.count) duplicate attempts", tag: LogTag.climbingData)
 
             // Track duplicates as deleted
             for attemptId in duplicateIds {
@@ -714,8 +738,9 @@ class ClimbingDataManager: ObservableObject {
         if initialAttemptCount != attempts.count {
             saveAttempts()
             let removedCount = initialAttemptCount - attempts.count
-            print(
-                "Cleanup complete. Removed \(removedCount) attempts. Remaining: \(attempts.count)"
+            AppLogger.info(
+                "Cleanup complete. Removed \(removedCount) attempts. Remaining: \(attempts.count)",
+                tag: LogTag.climbingData
             )
         }
 
@@ -725,7 +750,9 @@ class ClimbingDataManager: ObservableObject {
         }
 
         if !orphanedProblems.isEmpty {
-            print("🧹 Cleaning up \(orphanedProblems.count) orphaned problems")
+            AppLogger.info(
+                "🧹 Cleaning up \(orphanedProblems.count) orphaned problems",
+                tag: LogTag.climbingData)
 
             for problem in orphanedProblems {
                 trackDeletion(itemId: problem.id.uuidString, itemType: "problem")
@@ -744,7 +771,9 @@ class ClimbingDataManager: ObservableObject {
         }
 
         if !orphanedSessions.isEmpty {
-            print("🧹 Cleaning up \(orphanedSessions.count) orphaned sessions")
+            AppLogger.info(
+                "🧹 Cleaning up \(orphanedSessions.count) orphaned sessions",
+                tag: LogTag.climbingData)
 
             for session in orphanedSessions {
                 trackDeletion(itemId: session.id.uuidString, itemType: "session")
@@ -844,19 +873,29 @@ class ClimbingDataManager: ObservableObject {
             let problemsForImages = problems
 
             // Move heavy I/O operations to background thread
+            let logTag = LogTag.climbingData
             let zipData = try await Task.detached(priority: .userInitiated) {
                 // Collect actual image paths from disk for the ZIP
-                let referencedImagePaths = await Self.collectReferencedImagePathsStatic(
+                let imageSummary = Self.collectReferencedImagePathsStatic(
                     problems: problemsForImages,
                     imagesDirectory: imagesDirectory)
-                print("Starting export with \(referencedImagePaths.count) images")
+                let referencedImagePaths = imageSummary.paths
+
+                await MainActor.run {
+                    AppLogger.info(
+                        "Starting export with \(referencedImagePaths.count) images (\(imageSummary.missingCount) missing)",
+                        tag: logTag)
+                }
 
                 let zipData = try await ZipUtils.createExportZip(
                     exportData: exportData,
                     referencedImagePaths: referencedImagePaths
                 )
 
-                print("Export completed successfully")
+                await MainActor.run {
+                    AppLogger.info("Export completed successfully", tag: logTag)
+                }
+
                 return (zipData, referencedImagePaths.count)
             }.value
 
@@ -865,7 +904,7 @@ class ClimbingDataManager: ObservableObject {
             return zipData.0
         } catch {
             let errorMessage = "Export failed: \(error.localizedDescription)"
-            print("ERROR: \(errorMessage)")
+            AppLogger.error("ERROR: \(errorMessage)", tag: LogTag.climbingData)
             setError(errorMessage)
             return nil
         }
@@ -894,16 +933,24 @@ class ClimbingDataManager: ObservableObject {
                 return Date()
             }
 
-            print("Raw JSON content preview:")
-            print(String(decoding: importResult.jsonData.prefix(500), as: UTF8.self) + "...")
+            AppLogger.debug("Raw JSON content preview:", tag: LogTag.climbingData)
+            AppLogger.debug(
+                String(decoding: importResult.jsonData.prefix(500), as: UTF8.self) + "...",
+                tag: LogTag.climbingData
+            )
 
             let importData = try decoder.decode(ClimbDataBackup.self, from: importResult.jsonData)
 
-            print("Successfully decoded import data:")
-            print("- Gyms: \(importData.gyms.count)")
-            print("- Problems: \(importData.problems.count)")
-            print("- Sessions: \(importData.sessions.count)")
-            print("- Attempts: \(importData.attempts.count)")
+            AppLogger.info(
+                """
+                Successfully decoded import data:
+                - Gyms: \(importData.gyms.count)
+                - Problems: \(importData.problems.count)
+                - Sessions: \(importData.sessions.count)
+                - Attempts: \(importData.attempts.count)
+                """,
+                tag: LogTag.climbingData
+            )
 
             try validateImportData(importData)
 
@@ -960,14 +1007,20 @@ class ClimbingDataManager: ObservableObject {
 extension ClimbingDataManager {
     private func collectReferencedImagePaths() -> Set<String> {
         let imagesDirectory = ImageManager.shared.imagesDirectory.path
-        return Self.collectReferencedImagePathsStatic(
+        let result = Self.collectReferencedImagePathsStatic(
             problems: problems,
             imagesDirectory: imagesDirectory)
+
+        AppLogger.info(
+            "Export: Collected \(result.paths.count) images (\(result.missingCount) missing)",
+            tag: LogTag.climbingData)
+
+        return result.paths
     }
 
-    private static func collectReferencedImagePathsStatic(
+    nonisolated private static func collectReferencedImagePathsStatic(
         problems: [Problem], imagesDirectory: String
-    ) -> Set<String> {
+    ) -> (paths: Set<String>, missingCount: Int) {
         var imagePaths = Set<String>()
         var missingCount = 0
 
@@ -988,8 +1041,7 @@ extension ClimbingDataManager {
             }
         }
 
-        print("Export: Collected \(imagePaths.count) images (\(missingCount) missing)")
-        return imagePaths
+        return (imagePaths, missingCount)
     }
 
     private func updateProblemImagePaths(
@@ -1030,11 +1082,14 @@ extension ClimbingDataManager {
                             }
 
                             deterministicImagePaths.append(deterministicName)
-                            print("Renamed imported image: \(tempFileName) → \(deterministicName)")
+                            AppLogger.debug(
+                                "Renamed imported image: \(tempFileName) → \(deterministicName)",
+                                tag: LogTag.climbingData)
                         }
                     } catch {
-                        print(
-                            "Failed to rename imported image \(tempFileName) to \(deterministicName): \(error)"
+                        AppLogger.error(
+                            "Failed to rename imported image \(tempFileName) to \(deterministicName): \(error)",
+                            tag: LogTag.climbingData
                         )
                         deterministicImagePaths.append(tempFileName)
                     }
@@ -1078,7 +1133,8 @@ extension ClimbingDataManager {
         if needsUpdate {
             problems = updatedProblems
             saveProblems()
-            print("Migrated image paths for \(problems.count) problems")
+            AppLogger.info(
+                "Migrated image paths for \(problems.count) problems", tag: LogTag.climbingData)
         }
     }
 
@@ -1089,8 +1145,9 @@ extension ClimbingDataManager {
 
             // Log storage information for debugging
             let info = await ImageManager.shared.getStorageInfo()
-            print(
-                "Image Storage: \(info.primaryCount) primary, \(info.backupCount) backup, \(info.totalSize / 1024)KB total"
+            await AppLogger.debug(
+                "Image Storage: \(info.primaryCount) primary, \(info.backupCount) backup, \(info.totalSize / 1024)KB total",
+                tag: LogTag.climbingData
             )
         }.value
     }
@@ -1128,7 +1185,9 @@ extension ClimbingDataManager {
             }
 
             if !orphanedFiles.isEmpty {
-                print("Cleaned up \(orphanedFiles.count) orphaned image files")
+                AppLogger.info(
+                    "Cleaned up \(orphanedFiles.count) orphaned image files",
+                    tag: LogTag.climbingData)
             }
         }
     }
@@ -1145,7 +1204,7 @@ extension ClimbingDataManager {
     }
 
     func forceImageRecovery() {
-        print("User initiated force image recovery")
+        AppLogger.info("User initiated force image recovery", tag: LogTag.climbingData)
         ImageManager.shared.forceRecoveryMigration()
 
         // Refresh the UI after recovery
@@ -1153,7 +1212,7 @@ extension ClimbingDataManager {
     }
 
     func emergencyImageRestore() {
-        print("User initiated emergency image restore")
+        AppLogger.info("User initiated emergency image restore", tag: LogTag.climbingData)
         ImageManager.shared.emergencyImageRestore()
 
         // Refresh the UI after restore
@@ -1179,15 +1238,15 @@ extension ClimbingDataManager {
     }
 
     func testLiveActivity() {
-        print("🧪 Testing Live Activity functionality...")
+        AppLogger.info("Testing Live Activity functionality...", tag: LogTag.climbingData)
 
         // Check Live Activity availability
         let status = LiveActivityManager.shared.checkLiveActivityAvailability()
-        print(status)
+        AppLogger.info(status, tag: LogTag.climbingData)
 
         // Test with dummy data if we have a gym
         guard let testGym = gyms.first else {
-            print("ERROR: No gyms available for testing")
+            AppLogger.error("No gyms available for testing", tag: LogTag.climbingData)
             return
         }
 
@@ -1218,15 +1277,18 @@ extension ClimbingDataManager {
 
         // Only restart if session is actually active
         guard activeSession.status == .active else {
-            print(
-                "WARNING: Session exists but is not active (status: \(activeSession.status)), ending Live Activity"
+            AppLogger.warning(
+                "Session exists but is not active (status: \(activeSession.status)), ending Live Activity",
+                tag: LogTag.climbingData
             )
             await LiveActivityManager.shared.endLiveActivity()
             return
         }
 
         if let gym = gym(withId: activeSession.gymId) {
-            print("Checking Live Activity for active session at \(gym.name)")
+            AppLogger.info(
+                "Checking Live Activity for active session at \(gym.name)", tag: LogTag.climbingData
+            )
 
             // First cleanup any dismissed activities
             await LiveActivityManager.shared.cleanupDismissedActivities()
@@ -1241,7 +1303,9 @@ extension ClimbingDataManager {
 
     /// Call this when app becomes active to check for Live Activity restart
     func onAppBecomeActive() {
-        print("App became active - checking Live Activity status")
+        let logTag = "ClimbingData"
+        AppLogger.info(
+            "App became active - checking Live Activity status", tag: logTag)
         Task {
             await checkAndRestartLiveActivity()
         }
@@ -1249,35 +1313,46 @@ extension ClimbingDataManager {
 
     /// Call this when app enters background to update Live Activity
     func onAppEnterBackground() {
-        print("App entering background - updating Live Activity if needed")
+        let logTag = "ClimbingData"
+        AppLogger.info(
+            "App entering background - updating Live Activity if needed", tag: logTag)
         Task {
             await updateLiveActivityData()
         }
     }
 
     /// Setup notifications for Live Activity events
-    private func setupLiveActivityNotifications() {
+    nonisolated private func setupLiveActivityNotifications() {
+        let notificationName = Notification.Name("liveActivityDismissed")
+        let logTag = "ClimbingData"
+
         liveActivityObserver = NotificationCenter.default.addObserver(
-            forName: .liveActivityDismissed,
+            forName: notificationName,
             object: nil,
             queue: .main
         ) { [weak self] _ in
-            print("🔔 Received Live Activity dismissed notification - attempting restart")
             Task { @MainActor in
+                AppLogger.info(
+                    "Received Live Activity dismissed notification - attempting restart",
+                    tag: logTag)
                 await self?.handleLiveActivityDismissed()
             }
         }
     }
 
-    private func setupMigrationNotifications() {
+    nonisolated private func setupMigrationNotifications() {
+        let logTag = "ClimbingData"
+
         migrationObserver = NotificationCenter.default.addObserver(
             forName: NSNotification.Name("ImageMigrationCompleted"),
             object: nil,
             queue: .main
         ) { [weak self] notification in
             if let updateCount = notification.userInfo?["updateCount"] as? Int {
-                print("🔔 Image migration completed with \(updateCount) updates - reloading data")
                 Task { @MainActor in
+                    AppLogger.info(
+                        "Image migration completed with \(updateCount) updates - reloading data",
+                        tag: logTag)
                     self?.loadProblems()
                 }
             }
@@ -1293,7 +1368,9 @@ extension ClimbingDataManager {
             return
         }
 
-        print("Attempting to restart dismissed Live Activity for \(gym.name)")
+        AppLogger.info(
+            "Attempting to restart dismissed Live Activity for \(gym.name)",
+            tag: LogTag.climbingData)
 
         // Wait a bit before restarting to avoid frequency limits
         try? await Task.sleep(nanoseconds: 2_000_000_000)  // 2 seconds
@@ -1333,11 +1410,20 @@ extension ClimbingDataManager {
             activeSession.status == .active,
             let gym = gym(withId: activeSession.gymId)
         else {
-            print("WARNING: Live Activity update skipped - no active session or gym")
+            AppLogger.warning(
+                "Live Activity update skipped - no active session or gym",
+                tag: LogTag.climbingData
+            )
             if let session = activeSession {
-                print("  Session ID: \(session.id)")
-                print("  Session Status: \(session.status)")
-                print("  Gym ID: \(session.gymId)")
+                AppLogger.debug(
+                    """
+                    Skipped session details:
+                      Session ID: \(session.id)
+                      Session Status: \(session.status)
+                      Gym ID: \(session.gymId)
+                    """,
+                    tag: LogTag.climbingData
+                )
             }
             return
         }
@@ -1357,14 +1443,17 @@ extension ClimbingDataManager {
             elapsedInterval = 0
         }
 
-        print("Live Activity Update Debug:")
-        print("  Session ID: \(activeSession.id)")
-        print("  Gym: \(gym.name)")
-        print("  Total attempts in session: \(totalAttempts)")
-        print("  Completed problems: \(completedProblems)")
-        print("  Elapsed time: \(elapsedInterval) seconds")
-        print(
-            "  All attempts for session: \(attemptsForSession.map { "\($0.result) - Problem: \($0.problemId)" })"
+        AppLogger.debug(
+            """
+            Live Activity Update Debug:
+              Session ID: \(activeSession.id)
+              Gym: \(gym.name)
+              Total attempts in session: \(totalAttempts)
+              Completed problems: \(completedProblems)
+              Elapsed time: \(elapsedInterval) seconds
+              All attempts for session: \(attemptsForSession.map { "\($0.result) - Problem: \($0.problemId)" })
+            """,
+            tag: LogTag.climbingData
         )
 
         Task {

ios/Ascently/ViewModels/LiveActivityManager.swift

@@ -8,6 +8,7 @@ extension Notification.Name {
 @MainActor
 final class LiveActivityManager {
     static let shared = LiveActivityManager()
+    private static let logTag = "LiveActivity"
     private init() {}
 
     nonisolated(unsafe) private var currentActivity: Activity<SessionActivityAttributes>?
@@ -30,11 +31,12 @@ final class LiveActivityManager {
             let isStillActive = activities.contains { $0.id == currentActivity.id }
 
             if isStillActive {
-                print("Live Activity still running: \(currentActivity.id)")
+                AppLogger.debug("Live Activity still running: \(currentActivity.id)", tag: Self.logTag)
                 return
             } else {
-                print(
-                    "WARNING: Tracked Live Activity \(currentActivity.id) was dismissed, clearing reference"
+                AppLogger.warning(
+                    "Tracked Live Activity \(currentActivity.id) was dismissed, clearing reference",
+                    tag: Self.logTag
                 )
                 self.currentActivity = nil
             }
@@ -43,18 +45,18 @@ final class LiveActivityManager {
         // Check if there are ANY active Live Activities for this session
         let existingActivities = Activity<SessionActivityAttributes>.activities
         if let existingActivity = existingActivities.first {
-            print("Found existing Live Activity: \(existingActivity.id), using it")
+            AppLogger.info("Found existing Live Activity: \(existingActivity.id), using it", tag: Self.logTag)
             self.currentActivity = existingActivity
             return
         }
 
-        print("No Live Activity found, restarting for existing session")
+        AppLogger.info("No Live Activity found, restarting for existing session", tag: Self.logTag)
         await startLiveActivity(for: activeSession, gymName: gymName)
     }
 
     /// Call this when a ClimbSession starts to begin a Live Activity
     func startLiveActivity(for session: ClimbSession, gymName: String) async {
-        print("Starting Live Activity for gym: \(gymName)")
+        AppLogger.info("Starting Live Activity for gym: \(gymName)", tag: Self.logTag)
 
         await endLiveActivity()
 
@@ -80,18 +82,26 @@ final class LiveActivityManager {
                 pushType: nil
             )
             self.currentActivity = activity
-            print("Live Activity started successfully: \(activity.id)")
+            AppLogger.info("Live Activity started successfully: \(activity.id)", tag: Self.logTag)
         } catch {
-            print("ERROR: Failed to start live activity: \(error)")
-            print("Error details: \(error.localizedDescription)")
+            AppLogger.error(
+                """
+                Failed to start live activity: \(error)
+                Details: \(error.localizedDescription)
+                """,
+                tag: Self.logTag
+            )
 
             // Check specific error types
             if error.localizedDescription.contains("authorization") {
-                print("Authorization error - check Live Activity permissions in Settings")
+                AppLogger.warning(
+                    "Authorization error - check Live Activity permissions in Settings",
+                    tag: Self.logTag
+                )
             } else if error.localizedDescription.contains("content") {
-                print("Content error - check ActivityAttributes structure")
+                AppLogger.warning("Content error - check ActivityAttributes structure", tag: Self.logTag)
             } else if error.localizedDescription.contains("frequencyLimited") {
-                print("Frequency limited - too many Live Activities started recently")
+                AppLogger.warning("Frequency limited - too many Live Activities started recently", tag: Self.logTag)
             }
         }
     }
@@ -100,7 +110,7 @@ final class LiveActivityManager {
     func updateLiveActivity(elapsed: TimeInterval, totalAttempts: Int, completedProblems: Int) async
     {
         guard let currentActivity = currentActivity else {
-            print("WARNING: No current activity to update")
+            AppLogger.warning("No current activity to update", tag: Self.logTag)
             return
         }
 
@@ -109,15 +119,17 @@ final class LiveActivityManager {
         let isStillActive = activities.contains { $0.id == currentActivity.id }
 
         if !isStillActive {
-            print(
-                "WARNING: Tracked Live Activity \(currentActivity.id) is no longer active, clearing reference"
+            AppLogger.warning(
+                "Tracked Live Activity \(currentActivity.id) is no longer active, clearing reference",
+                tag: Self.logTag
             )
             self.currentActivity = nil
             return
         }
 
-        print(
-            "Updating Live Activity - Attempts: \(totalAttempts), Completed: \(completedProblems)"
+        AppLogger.debug(
+            "Updating Live Activity - Attempts: \(totalAttempts), Completed: \(completedProblems)",
+            tag: Self.logTag
         )
 
         let updatedContentState = SessionActivityAttributes.ContentState(
@@ -137,26 +149,26 @@ final class LiveActivityManager {
 
         // First end the tracked activity if it exists
         if let currentActivity {
-            print("Ending tracked Live Activity: \(currentActivity.id)")
+            AppLogger.info("Ending tracked Live Activity: \(currentActivity.id)", tag: Self.logTag)
             nonisolated(unsafe) let activity = currentActivity
             await activity.end(nil, dismissalPolicy: .immediate)
             self.currentActivity = nil
-            print("Tracked Live Activity ended successfully")
+            AppLogger.info("Tracked Live Activity ended successfully", tag: Self.logTag)
         }
 
         // Force end ALL active activities of our type to ensure cleanup
-        print("Checking for any remaining active activities...")
+        AppLogger.debug("Checking for any remaining active activities...", tag: Self.logTag)
         let activities = Activity<SessionActivityAttributes>.activities
 
         if activities.isEmpty {
-            print("No additional activities found")
+            AppLogger.debug("No additional activities found", tag: Self.logTag)
         } else {
-            print("Found \(activities.count) additional active activities, ending them...")
+            AppLogger.info("Found \(activities.count) additional active activities, ending them...", tag: Self.logTag)
             for activity in activities {
-                print("Force ending activity: \(activity.id)")
+                AppLogger.debug("Force ending activity: \(activity.id)", tag: Self.logTag)
                 await activity.end(nil, dismissalPolicy: .immediate)
             }
-            print("All Live Activities ended successfully")
+            AppLogger.info("All Live Activities ended successfully", tag: Self.logTag)
         }
     }
 
@@ -174,7 +186,7 @@ final class LiveActivityManager {
             • All Active Activities: \(allActivities.count)
             """
 
-        print(message)
+        AppLogger.info(message, tag: Self.logTag)
         return message
     }
 
@@ -185,7 +197,7 @@ final class LiveActivityManager {
         if let currentActivity = currentActivity {
             let isStillActive = activities.contains { $0.id == currentActivity.id }
             if !isStillActive {
-                print("Cleaning up dismissed Live Activity: \(currentActivity.id)")
+                AppLogger.info("Cleaning up dismissed Live Activity: \(currentActivity.id)", tag: Self.logTag)
                 self.currentActivity = nil
             }
         }
@@ -195,7 +207,7 @@ final class LiveActivityManager {
     func startHealthChecks() {
         stopHealthChecks()  // Stop any existing timer
 
-        print("🩺 Starting Live Activity health checks")
+        AppLogger.debug("🩺 Starting Live Activity health checks", tag: Self.logTag)
         healthCheckTimer = Timer.scheduledTimer(withTimeInterval: 30.0, repeats: true) {
             [weak self] _ in
             Task { @MainActor [weak self] in
@@ -208,7 +220,7 @@ final class LiveActivityManager {
     func stopHealthChecks() {
         healthCheckTimer?.invalidate()
         healthCheckTimer = nil
-        print("Stopped Live Activity health checks")
+        AppLogger.debug("Stopped Live Activity health checks", tag: Self.logTag)
     }
 
     /// Perform a health check on the current Live Activity
@@ -221,14 +233,14 @@ final class LiveActivityManager {
         // Only perform health check if it's been at least 25 seconds
         guard timeSinceLastCheck >= 25 else { return }
 
-        print("🩺 Performing Live Activity health check")
+        AppLogger.debug("🩺 Performing Live Activity health check", tag: Self.logTag)
         lastHealthCheck = now
 
         let activities = Activity<SessionActivityAttributes>.activities
         let isStillActive = activities.contains { $0.id == currentActivity.id }
 
         if !isStillActive {
-            print("Health check failed - Live Activity was dismissed")
+            AppLogger.warning("Health check failed - Live Activity was dismissed", tag: Self.logTag)
             self.currentActivity = nil
 
             // Notify that we need to restart
@@ -237,7 +249,7 @@ final class LiveActivityManager {
                 object: nil
             )
         } else {
-            print("Live Activity health check passed")
+            AppLogger.debug("Live Activity health check passed", tag: Self.logTag)
         }
     }
 

ios/Ascently/Views/AddEdit/AddAttemptView.swift

@@ -5,6 +5,7 @@ struct AddAttemptView: View {
     let session: ClimbSession
     let gym: Gym
     @EnvironmentObject var dataManager: ClimbingDataManager
+    @EnvironmentObject var themeManager: ThemeManager
     @Environment(\.dismiss) private var dismiss
 
     @State private var selectedProblem: Problem?
@@ -158,6 +159,7 @@ struct AddAttemptView: View {
                         showingCreateProblem = true
                     }
                     .buttonStyle(.borderedProminent)
+                    .tint(themeManager.accentColor)
                 }
                 .padding(.vertical, 8)
             } else {
@@ -179,7 +181,7 @@ struct AddAttemptView: View {
                 Button("Create New Problem") {
                     showingCreateProblem = true
                 }
-                .foregroundColor(.blue)
+                .foregroundColor(themeManager.accentColor)
             }
         }
     }
@@ -198,7 +200,7 @@ struct AddAttemptView: View {
                     selectedPhotos = []
                     imageData = []
                 }
-                .foregroundColor(.blue)
+                .foregroundColor(themeManager.accentColor)
             }
         }
 
@@ -213,7 +215,7 @@ struct AddAttemptView: View {
                     Spacer()
                     if selectedClimbType == climbType {
                         Image(systemName: "checkmark.circle.fill")
-                            .foregroundColor(.blue)
+                            .foregroundColor(themeManager.accentColor)
                     } else {
                         Image(systemName: "circle")
                             .foregroundColor(.gray)
@@ -238,7 +240,7 @@ struct AddAttemptView: View {
                         Spacer()
                         if selectedDifficultySystem == system {
                             Image(systemName: "checkmark.circle.fill")
-                                .foregroundColor(.blue)
+                                .foregroundColor(themeManager.accentColor)
                         } else {
                             Image(systemName: "circle")
                                 .foregroundColor(.gray)
@@ -272,7 +274,7 @@ struct AddAttemptView: View {
                                 }
                                 .buttonStyle(.bordered)
                                 .controlSize(.small)
-                                .tint(newProblemGrade == grade ? .blue : .gray)
+                                .tint(newProblemGrade == grade ? themeManager.accentColor : .gray)
                             }
                         }
                         .padding(.horizontal, 1)
@@ -287,12 +289,12 @@ struct AddAttemptView: View {
             }) {
                 HStack {
                     Image(systemName: "camera.fill")
-                        .foregroundColor(.blue)
+                        .foregroundColor(themeManager.accentColor)
                         .font(.title2)
                     VStack(alignment: .leading, spacing: 2) {
                         Text("Add Photos")
                             .font(.headline)
-                            .foregroundColor(.blue)
+                            .foregroundColor(themeManager.accentColor)
                         Text("\(imageData.count) of 5 photos added")
                             .font(.caption)
                             .foregroundColor(.secondary)
@@ -353,7 +355,7 @@ struct AddAttemptView: View {
                     Spacer()
                     if selectedResult == result {
                         Image(systemName: "checkmark.circle.fill")
-                            .foregroundColor(.blue)
+                            .foregroundColor(themeManager.accentColor)
                     } else {
                         Image(systemName: "circle")
                             .foregroundColor(.gray)
@@ -529,6 +531,7 @@ struct ProblemSelectionRow: View {
     let problem: Problem
     let isSelected: Bool
     let action: () -> Void
+    @EnvironmentObject var themeManager: ThemeManager
 
     var body: some View {
         HStack {
@@ -539,7 +542,7 @@ struct ProblemSelectionRow: View {
 
                 Text("\(problem.difficulty.system.displayName): \(problem.difficulty.grade)")
                     .font(.subheadline)
-                    .foregroundColor(.blue)
+                    .foregroundColor(themeManager.accentColor)
 
                 if let location = problem.location {
                     Text(location)
@@ -552,7 +555,7 @@ struct ProblemSelectionRow: View {
 
             if isSelected {
                 Image(systemName: "checkmark.circle.fill")
-                    .foregroundColor(.blue)
+                    .foregroundColor(themeManager.accentColor)
             } else {
                 Image(systemName: "circle")
                     .foregroundColor(.gray)
@@ -569,6 +572,7 @@ struct ProblemSelectionCard: View {
     let isSelected: Bool
     let action: () -> Void
     @State private var showingExpandedView = false
+    @EnvironmentObject var themeManager: ThemeManager
 
     var body: some View {
         VStack(spacing: 8) {
@@ -594,7 +598,7 @@ struct ProblemSelectionCard: View {
                         if isSelected {
                             Image(systemName: "checkmark.circle.fill")
                                 .foregroundColor(.white)
-                                .background(Circle().fill(.blue))
+                                .background(Circle().fill(themeManager.accentColor))
                                 .font(.title3)
                         }
                     }
@@ -634,7 +638,7 @@ struct ProblemSelectionCard: View {
                 Text(problem.difficulty.grade)
                     .font(.caption2)
                     .fontWeight(.bold)
-                    .foregroundColor(.blue)
+                    .foregroundColor(themeManager.accentColor)
 
                 if let location = problem.location {
                     Text(location)
@@ -648,8 +652,8 @@ struct ProblemSelectionCard: View {
         .padding(8)
         .background(
             RoundedRectangle(cornerRadius: 12)
-                .fill(isSelected ? .blue.opacity(0.1) : .gray.opacity(0.05))
-                .stroke(isSelected ? .blue : .clear, lineWidth: 2)
+                .fill(isSelected ? themeManager.accentColor.opacity(0.1) : .gray.opacity(0.05))
+                .stroke(isSelected ? themeManager.accentColor : .clear, lineWidth: 2)
         )
         .contentShape(Rectangle())
         .onTapGesture {
@@ -668,6 +672,7 @@ struct ProblemSelectionCard: View {
 struct ProblemExpandedView: View {
     let problem: Problem
     @Environment(\.dismiss) private var dismiss
+    @EnvironmentObject var themeManager: ThemeManager
     @State private var selectedImageIndex = 0
 
     var body: some View {
@@ -696,7 +701,7 @@ struct ProblemExpandedView: View {
                             Text(problem.difficulty.grade)
                                 .font(.title3)
                                 .fontWeight(.bold)
-                                .foregroundColor(.blue)
+                                .foregroundColor(themeManager.accentColor)
 
                             Text(problem.climbType.displayName)
                                 .font(.subheadline)
@@ -724,9 +729,9 @@ struct ProblemExpandedView: View {
                                             .padding(.vertical, 4)
                                             .background(
                                                 RoundedRectangle(cornerRadius: 8)
-                                                    .fill(.blue.opacity(0.1))
+                                                    .fill(themeManager.accentColor.opacity(0.1))
                                             )
-                                            .foregroundColor(.blue)
+                                            .foregroundColor(themeManager.accentColor)
                                     }
                                 }
                                 .padding(.horizontal)
@@ -752,6 +757,7 @@ struct ProblemExpandedView: View {
 struct EditAttemptView: View {
     let attempt: Attempt
     @EnvironmentObject var dataManager: ClimbingDataManager
+    @EnvironmentObject var themeManager: ThemeManager
     @Environment(\.dismiss) private var dismiss
 
     @State private var selectedProblem: Problem?
@@ -926,6 +932,7 @@ struct EditAttemptView: View {
                         showingCreateProblem = true
                     }
                     .buttonStyle(.borderedProminent)
+                    .tint(themeManager.accentColor)
                 }
                 .padding(.vertical, 8)
             } else {
@@ -947,7 +954,7 @@ struct EditAttemptView: View {
                 Button("Create New Problem") {
                     showingCreateProblem = true
                 }
-                .foregroundColor(.blue)
+                .foregroundColor(themeManager.accentColor)
             }
         }
     }
@@ -966,7 +973,7 @@ struct EditAttemptView: View {
                     selectedPhotos = []
                     imageData = []
                 }
-                .foregroundColor(.blue)
+                .foregroundColor(themeManager.accentColor)
             }
         }
 
@@ -981,7 +988,7 @@ struct EditAttemptView: View {
                     Spacer()
                     if selectedClimbType == climbType {
                         Image(systemName: "checkmark.circle.fill")
-                            .foregroundColor(.blue)
+                            .foregroundColor(themeManager.accentColor)
                     } else {
                         Image(systemName: "circle")
                             .foregroundColor(.gray)
@@ -1006,7 +1013,7 @@ struct EditAttemptView: View {
                         Spacer()
                         if selectedDifficultySystem == system {
                             Image(systemName: "checkmark.circle.fill")
-                                .foregroundColor(.blue)
+                                .foregroundColor(themeManager.accentColor)
                         } else {
                             Image(systemName: "circle")
                                 .foregroundColor(.gray)
@@ -1040,7 +1047,7 @@ struct EditAttemptView: View {
                                 }
                                 .buttonStyle(.bordered)
                                 .controlSize(.small)
-                                .tint(newProblemGrade == grade ? .blue : .gray)
+                                .tint(newProblemGrade == grade ? themeManager.accentColor : .gray)
                             }
                         }
                         .padding(.horizontal, 1)
@@ -1055,12 +1062,12 @@ struct EditAttemptView: View {
             }) {
                 HStack {
                     Image(systemName: "camera.fill")
-                        .foregroundColor(.blue)
+                        .foregroundColor(themeManager.accentColor)
                         .font(.title2)
                     VStack(alignment: .leading, spacing: 2) {
                         Text("Add Photos")
                             .font(.headline)
-                            .foregroundColor(.blue)
+                            .foregroundColor(themeManager.accentColor)
                         Text("\(imageData.count) of 5 photos added")
                             .font(.caption)
                             .foregroundColor(.secondary)
@@ -1121,7 +1128,7 @@ struct EditAttemptView: View {
                     Spacer()
                     if selectedResult == result {
                         Image(systemName: "checkmark.circle.fill")
-                            .foregroundColor(.blue)
+                            .foregroundColor(themeManager.accentColor)
                     } else {
                         Image(systemName: "circle")
                             .foregroundColor(.gray)

ios/Ascently/Views/AddEdit/AddEditGymView.swift

@@ -3,6 +3,7 @@ import SwiftUI
 struct AddEditGymView: View {
     let gymId: UUID?
     @EnvironmentObject var dataManager: ClimbingDataManager
+    @EnvironmentObject var themeManager: ThemeManager
     @Environment(\.dismiss) private var dismiss
 
     @State private var name = ""
@@ -83,7 +84,7 @@ struct AddEditGymView: View {
                     Spacer()
                     if selectedClimbTypes.contains(climbType) {
                         Image(systemName: "checkmark.circle.fill")
-                            .foregroundColor(.blue)
+                            .foregroundColor(themeManager.accentColor)
                     } else {
                         Image(systemName: "circle")
                             .foregroundColor(.gray)
@@ -115,7 +116,7 @@ struct AddEditGymView: View {
                         Spacer()
                         if selectedDifficultySystems.contains(system) {
                             Image(systemName: "checkmark.circle.fill")
-                                .foregroundColor(.blue)
+                                .foregroundColor(themeManager.accentColor)
                         } else {
                             Image(systemName: "circle")
                                 .foregroundColor(.gray)

ios/Ascently/Views/AddEdit/AddEditProblemView.swift

@@ -5,6 +5,7 @@ struct AddEditProblemView: View {
     let problemId: UUID?
     let gymId: UUID?
     @EnvironmentObject var dataManager: ClimbingDataManager
+    @EnvironmentObject var themeManager: ThemeManager
     @Environment(\.dismiss) private var dismiss
 
     @State private var selectedGym: Gym?
@@ -192,7 +193,7 @@ struct AddEditProblemView: View {
 
                         if selectedGym?.id == gym.id {
                             Image(systemName: "checkmark.circle.fill")
-                                .foregroundColor(.blue)
+                                .foregroundColor(themeManager.accentColor)
                         }
                     }
                     .contentShape(Rectangle())
@@ -235,7 +236,7 @@ struct AddEditProblemView: View {
                         Spacer()
                         if selectedClimbType == climbType {
                             Image(systemName: "checkmark.circle.fill")
-                                .foregroundColor(.blue)
+                                .foregroundColor(themeManager.accentColor)
                         } else {
                             Image(systemName: "circle")
                                 .foregroundColor(.gray)
@@ -264,7 +265,7 @@ struct AddEditProblemView: View {
                         Spacer()
                         if selectedDifficultySystem == system {
                             Image(systemName: "checkmark.circle.fill")
-                                .foregroundColor(.blue)
+                                .foregroundColor(themeManager.accentColor)
                         } else {
                             Image(systemName: "circle")
                                 .foregroundColor(.gray)
@@ -337,7 +338,7 @@ struct AddEditProblemView: View {
                 } else {
                     Text("Selected: \(difficultyGrade)")
                         .font(.caption)
-                        .foregroundColor(.blue)
+                        .foregroundColor(themeManager.accentColor)
                 }
             }
         }
@@ -372,12 +373,12 @@ struct AddEditProblemView: View {
             }) {
                 HStack {
                     Image(systemName: "camera.fill")
-                        .foregroundColor(.blue)
+                        .foregroundColor(themeManager.accentColor)
                         .font(.title2)
                     VStack(alignment: .leading, spacing: 2) {
                         Text("Add Photos")
                             .font(.headline)
-                            .foregroundColor(.blue)
+                            .foregroundColor(themeManager.accentColor)
                         Text("\(imageData.count) of 5 photos added")
                             .font(.caption)
                             .foregroundColor(.secondary)

ios/Ascently/Views/AddEdit/AddEditSessionView.swift

@@ -3,6 +3,7 @@ import SwiftUI
 struct AddEditSessionView: View {
     let sessionId: UUID?
     @EnvironmentObject var dataManager: ClimbingDataManager
+    @EnvironmentObject var themeManager: ThemeManager
     @Environment(\.dismiss) private var dismiss
 
     @State private var selectedGym: Gym?
@@ -71,7 +72,7 @@ struct AddEditSessionView: View {
 
                         if selectedGym?.id == gym.id {
                             Image(systemName: "checkmark.circle.fill")
-                                .foregroundColor(.blue)
+                                .foregroundColor(themeManager.accentColor)
                         }
                     }
                     .contentShape(Rectangle())

ios/Ascently/Views/AnalyticsView.swift

@@ -2,6 +2,7 @@ import SwiftUI
 
 struct AnalyticsView: View {
     @EnvironmentObject var dataManager: ClimbingDataManager
+    @EnvironmentObject var themeManager: ThemeManager
 
     var body: some View {
         NavigationStack {
@@ -25,7 +26,7 @@ struct AnalyticsView: View {
                     if dataManager.isSyncing {
                         HStack(spacing: 2) {
                             ProgressView()
-                                .progressViewStyle(CircularProgressViewStyle(tint: .blue))
+                                .progressViewStyle(CircularProgressViewStyle(tint: themeManager.accentColor))
                                 .scaleEffect(0.6)
                         }
                         .padding(.horizontal, 6)
@@ -47,6 +48,7 @@ struct AnalyticsView: View {
 
 struct OverallStatsSection: View {
     @EnvironmentObject var dataManager: ClimbingDataManager
+    @EnvironmentObject var themeManager: ThemeManager
 
     var body: some View {
         VStack(alignment: .leading, spacing: 16) {
@@ -59,7 +61,7 @@ struct OverallStatsSection: View {
                     title: "Sessions",
                     value: "\(dataManager.completedSessions().count)",
                     icon: "play.fill",
-                    color: .blue
+                    color: themeManager.accentColor
                 )
 
                 StatCard(
@@ -117,13 +119,15 @@ struct StatCard: View {
         .padding()
         .background(
             RoundedRectangle(cornerRadius: 12)
-                .fill(.ultraThinMaterial)
+                .fill(Color(uiColor: .secondarySystemGroupedBackground))
+                .shadow(color: .black.opacity(0.05), radius: 2, x: 0, y: 1)
         )
     }
 }
 
 struct ProgressChartSection: View {
     @EnvironmentObject var dataManager: ClimbingDataManager
+    @EnvironmentObject var themeManager: ThemeManager
     @State private var selectedSystem: DifficultySystem = .vScale
     @State private var showAllTime: Bool = true
     @State private var cachedGradeCountData: [GradeCount] = []
@@ -178,10 +182,10 @@ struct ProgressChartSection: View {
                             .padding(.vertical, 4)
                             .background(
                                 RoundedRectangle(cornerRadius: 6)
-                                    .fill(showAllTime ? .blue : .clear)
-                                    .stroke(.blue.opacity(0.3), lineWidth: 1)
+                                    .fill(showAllTime ? themeManager.accentColor : .clear)
+                                    .stroke(themeManager.accentColor.opacity(0.3), lineWidth: 1)
                             )
-                            .foregroundColor(showAllTime ? .white : .blue)
+                            .foregroundColor(showAllTime ? themeManager.contrastingTextColor : themeManager.accentColor)
                     }
 
                     Button(action: {
@@ -194,10 +198,10 @@ struct ProgressChartSection: View {
                             .padding(.vertical, 4)
                             .background(
                                 RoundedRectangle(cornerRadius: 6)
-                                    .fill(!showAllTime ? .blue : .clear)
-                                    .stroke(.blue.opacity(0.3), lineWidth: 1)
+                                    .fill(!showAllTime ? themeManager.accentColor : .clear)
+                                    .stroke(themeManager.accentColor.opacity(0.3), lineWidth: 1)
                             )
-                            .foregroundColor(!showAllTime ? .white : .blue)
+                            .foregroundColor(!showAllTime ? themeManager.contrastingTextColor : themeManager.accentColor)
                     }
                 }
 
@@ -215,7 +219,7 @@ struct ProgressChartSection: View {
                                     if selectedSystem == system {
                                         Spacer()
                                         Image(systemName: "checkmark")
-                                            .foregroundColor(.blue)
+                                            .foregroundColor(themeManager.accentColor)
                                     }
                                 }
                             }
@@ -232,10 +236,10 @@ struct ProgressChartSection: View {
                         .padding(.vertical, 6)
                         .background(
                             RoundedRectangle(cornerRadius: 8)
-                                .fill(.blue.opacity(0.1))
-                                .stroke(.blue.opacity(0.3), lineWidth: 1)
+                                .fill(themeManager.accentColor.opacity(0.1))
+                                .stroke(themeManager.accentColor.opacity(0.3), lineWidth: 1)
                         )
-                        .foregroundColor(.blue)
+                        .foregroundColor(themeManager.accentColor)
                     }
                 }
             }
@@ -336,6 +340,7 @@ struct GradeCount {
 
 struct BarChartView: View {
     let data: [GradeCount]
+    @EnvironmentObject var themeManager: ThemeManager
 
     private var sortedData: [GradeCount] {
         data.sorted { $0.gradeNumeric < $1.gradeNumeric }
@@ -367,7 +372,7 @@ struct BarChartView: View {
                             VStack(spacing: 4) {
                                 // Bar
                                 RoundedRectangle(cornerRadius: 4)
-                                    .fill(.blue)
+                                    .fill(themeManager.accentColor)
                                     .frame(
                                         width: barWidth,
                                         height: CGFloat(gradeCount.count) / CGFloat(maxCount)
@@ -377,7 +382,7 @@ struct BarChartView: View {
                                         Text("\(gradeCount.count)")
                                             .font(.caption2)
                                             .fontWeight(.medium)
-                                            .foregroundColor(.white)
+                                            .foregroundColor(themeManager.contrastingTextColor)
                                             .opacity(gradeCount.count > 0 ? 1 : 0)
                                     )
 
@@ -471,6 +476,7 @@ struct FavoriteGymSection: View {
 
 struct RecentActivitySection: View {
     @EnvironmentObject var dataManager: ClimbingDataManager
+    @EnvironmentObject var themeManager: ThemeManager
 
     private var recentSessionsCount: Int {
         dataManager.sessions.count
@@ -485,7 +491,7 @@ struct RecentActivitySection: View {
             HStack {
                 Image(systemName: "clock.fill")
                     .font(.title2)
-                    .foregroundColor(.blue)
+                    .foregroundColor(themeManager.accentColor)
 
                 Text("Recent Activity")
                     .font(.title2)
@@ -499,7 +505,7 @@ struct RecentActivitySection: View {
                     HStack {
                         Image(systemName: "play.circle")
                             .font(.subheadline)
-                            .foregroundColor(.blue)
+                            .foregroundColor(themeManager.accentColor)
 
                         Text("\(recentSessionsCount) sessions")
                             .font(.subheadline)

ios/Ascently/Views/CalendarView.swift

@@ -2,6 +2,7 @@ import SwiftUI
 
 struct CalendarView: View {
     @EnvironmentObject var dataManager: ClimbingDataManager
+    @EnvironmentObject var themeManager: ThemeManager
     let sessions: [ClimbSession]
     @Binding var selectedMonth: Date
     @Binding var selectedDate: Date?
@@ -68,7 +69,7 @@ struct CalendarView: View {
                             Image(systemName: "chevron.left")
                                 .font(.title2)
                                 .fontWeight(.semibold)
-                                .foregroundColor(.blue)
+                                .foregroundColor(themeManager.accentColor)
                         }
                         .frame(width: 44, height: 44)
 
@@ -84,7 +85,7 @@ struct CalendarView: View {
                             Image(systemName: "chevron.right")
                                 .font(.title2)
                                 .fontWeight(.semibold)
-                                .foregroundColor(.blue)
+                                .foregroundColor(themeManager.accentColor)
                         }
                         .frame(width: 44, height: 44)
                     }
@@ -97,10 +98,10 @@ struct CalendarView: View {
                         Text("Today")
                             .font(.subheadline)
                             .fontWeight(.semibold)
-                            .foregroundColor(.white)
+                            .foregroundColor(themeManager.contrastingTextColor)
                             .padding(.horizontal, 20)
                             .padding(.vertical, 8)
-                            .background(Color.blue)
+                            .background(themeManager.accentColor)
                             .clipShape(Capsule())
                     }
                 }
@@ -209,6 +210,7 @@ struct CalendarDayCell: View {
     let isToday: Bool
     let isInCurrentMonth: Bool
     let onTap: () -> Void
+    @EnvironmentObject var themeManager: ThemeManager
 
     var dayNumber: String {
         let formatter = DateFormatter()
@@ -224,9 +226,9 @@ struct CalendarDayCell: View {
                     .fontWeight(sessions.isEmpty ? .regular : .medium)
                     .foregroundColor(
                         isSelected
-                            ? .white
+                            ? themeManager.contrastingTextColor
                             : isToday
-                                ? .blue
+                                ? themeManager.accentColor
                                 : !isInCurrentMonth
                                     ? .secondary.opacity(0.3)
                                     : sessions.isEmpty ? .secondary : .primary
@@ -234,7 +236,7 @@ struct CalendarDayCell: View {
 
                 if !sessions.isEmpty {
                     Circle()
-                        .fill(isSelected ? .white : .blue)
+                        .fill(isSelected ? themeManager.contrastingTextColor : themeManager.accentColor)
                         .frame(width: 4, height: 4)
                 } else {
                     Spacer()
@@ -247,13 +249,13 @@ struct CalendarDayCell: View {
             .background(
                 RoundedRectangle(cornerRadius: 6)
                     .fill(
-                        isSelected ? Color.blue : isToday ? Color.blue.opacity(0.1) : Color.clear
+                        isSelected ? themeManager.accentColor : isToday ? themeManager.accentColor.opacity(0.1) : Color.clear
                     )
             )
             .overlay(
                 RoundedRectangle(cornerRadius: 6)
                     .stroke(
-                        isToday && !isSelected ? Color.blue.opacity(0.3) : Color.clear, lineWidth: 1
+                        isToday && !isSelected ? themeManager.accentColor.opacity(0.3) : Color.clear, lineWidth: 1
                     )
             )
         }

ios/Ascently/Views/Detail/GymDetailView.swift

@@ -3,6 +3,7 @@ import SwiftUI
 struct GymDetailView: View {
     let gymId: UUID
     @EnvironmentObject var dataManager: ClimbingDataManager
+    @EnvironmentObject var themeManager: ThemeManager
     @Environment(\.dismiss) private var dismiss
     @State private var showingDeleteAlert = false
 
@@ -108,6 +109,7 @@ struct GymDetailView: View {
 
 struct GymHeaderCard: View {
     let gym: Gym
+    @EnvironmentObject var themeManager: ThemeManager
 
     var body: some View {
         VStack(alignment: .leading, spacing: 16) {
@@ -145,9 +147,9 @@ struct GymHeaderCard: View {
                                     .padding(.vertical, 6)
                                     .background(
                                         RoundedRectangle(cornerRadius: 12)
-                                            .fill(.blue.opacity(0.1))
+                                            .fill(themeManager.accentColor.opacity(0.1))
                                     )
-                                    .foregroundColor(.blue)
+                                    .foregroundColor(themeManager.accentColor)
                             }
                         }
                         .padding(.horizontal, 1)
@@ -318,8 +320,8 @@ struct ProblemRowCard: View {
         .padding()
         .background(
             RoundedRectangle(cornerRadius: 12)
-                .fill(.ultraThinMaterial)
-                .stroke(.quaternary, lineWidth: 1)
+                .fill(Color(uiColor: .secondarySystemGroupedBackground))
+                .shadow(color: .black.opacity(0.05), radius: 2, x: 0, y: 1)
         )
     }
 }
@@ -371,8 +373,8 @@ struct SessionRowCard: View {
         .padding()
         .background(
             RoundedRectangle(cornerRadius: 12)
-                .fill(.ultraThinMaterial)
-                .stroke(.quaternary, lineWidth: 1)
+                .fill(Color(uiColor: .secondarySystemGroupedBackground))
+                .shadow(color: .black.opacity(0.05), radius: 2, x: 0, y: 1)
         )
     }
 

ios/Ascently/Views/Detail/ProblemDetailView.swift

@@ -3,6 +3,7 @@ import SwiftUI
 struct ProblemDetailView: View {
     let problemId: UUID
     @EnvironmentObject var dataManager: ClimbingDataManager
+    @EnvironmentObject var themeManager: ThemeManager
     @Environment(\.dismiss) private var dismiss
     @State private var showingDeleteAlert = false
     @State private var showingImageViewer = false
@@ -125,6 +126,7 @@ struct ProblemDetailView: View {
 struct ProblemHeaderCard: View {
     let problem: Problem
     let gym: Gym
+    @EnvironmentObject var themeManager: ThemeManager
 
     var body: some View {
         VStack(alignment: .leading, spacing: 16) {
@@ -151,7 +153,7 @@ struct ProblemHeaderCard: View {
                     Text(problem.difficulty.grade)
                         .font(.title)
                         .fontWeight(.bold)
-                        .foregroundColor(.blue)
+                        .foregroundColor(themeManager.accentColor)
 
                     Text(problem.climbType.displayName)
                         .font(.subheadline)
@@ -178,9 +180,9 @@ struct ProblemHeaderCard: View {
                                 .padding(.vertical, 4)
                                 .background(
                                     RoundedRectangle(cornerRadius: 8)
-                                        .fill(.blue.opacity(0.1))
+                                        .fill(themeManager.accentColor.opacity(0.1))
                                 )
-                                .foregroundColor(.blue)
+                                .foregroundColor(themeManager.accentColor)
                         }
                     }
                     .padding(.horizontal, 1)
@@ -223,6 +225,7 @@ struct ProgressSummaryCard: View {
     let totalAttempts: Int
     let successfulAttempts: Int
     let firstSuccess: (date: Date, result: AttemptResult)?
+    @EnvironmentObject var themeManager: ThemeManager
 
     var body: some View {
         VStack(alignment: .leading, spacing: 16) {
@@ -251,7 +254,7 @@ struct ProgressSummaryCard: View {
                             "\(formatDate(firstSuccess.date)) (\(firstSuccess.result.displayName))"
                         )
                         .font(.subheadline)
-                        .foregroundColor(.blue)
+                        .foregroundColor(themeManager.accentColor)
                     }
                     .padding(.top, 8)
                 }
@@ -396,7 +399,8 @@ struct AttemptHistoryCard: View {
         .padding()
         .background(
             RoundedRectangle(cornerRadius: 12)
-                .fill(.ultraThinMaterial)
+                .fill(Color(uiColor: .secondarySystemGroupedBackground))
+                .shadow(color: .black.opacity(0.05), radius: 2, x: 0, y: 1)
         )
     }
 

ios/Ascently/Views/Detail/SessionDetailView.swift

@@ -4,6 +4,7 @@ import SwiftUI
 struct SessionDetailView: View {
     let sessionId: UUID
     @EnvironmentObject var dataManager: ClimbingDataManager
+    @EnvironmentObject var themeManager: ThemeManager
     @Environment(\.dismiss) private var dismiss
     @State private var showingDeleteAlert = false
     @State private var showingAddAttempt = false
@@ -35,26 +36,92 @@ struct SessionDetailView: View {
     }
 
     var body: some View {
-        ScrollView {
-            LazyVStack(spacing: 20) {
-                if let session = session, let gym = gym {
+        List {
+            if let session = session, let gym = gym {
+                Section {
                     SessionHeaderCard(
                         session: session, gym: gym, stats: sessionStats)
+                    .listRowInsets(EdgeInsets())
+                    .listRowBackground(Color.clear)
+                    .listRowSeparator(.hidden)
+                    .padding(.bottom, 8)
 
                     SessionStatsCard(stats: sessionStats)
-
-                    AttemptsSection(
-                        attemptsWithProblems: attemptsWithProblems,
-                        attemptToDelete: $attemptToDelete,
-                        editingAttempt: $editingAttempt)
-                } else {
-                    Text("Session not found")
-                        .foregroundColor(.secondary)
+                    .listRowInsets(EdgeInsets())
+                    .listRowBackground(Color.clear)
+                    .listRowSeparator(.hidden)
                 }
-            }
-            .padding()
-        }
 
+                Section {
+                    if attemptsWithProblems.isEmpty {
+                        VStack(spacing: 12) {
+                            Image(systemName: "hand.raised.slash")
+                                .font(.title)
+                                .foregroundColor(.secondary)
+
+                            Text("No attempts yet")
+                                .font(.headline)
+                                .foregroundColor(.secondary)
+
+                            Text("Start attempting problems to see your progress!")
+                                .font(.subheadline)
+                                .foregroundColor(.secondary)
+                                .multilineTextAlignment(.center)
+                        }
+                        .frame(maxWidth: .infinity)
+                        .padding()
+                        .background(
+                            RoundedRectangle(cornerRadius: 16)
+                                .fill(.regularMaterial)
+                        )
+                        .listRowBackground(Color.clear)
+                        .listRowSeparator(.hidden)
+                    } else {
+                        ForEach(attemptsWithProblems.indices, id: \.self) { index in
+                            let (attempt, problem) = attemptsWithProblems[index]
+                            AttemptCard(attempt: attempt, problem: problem)
+                                .listRowBackground(Color.clear)
+                                .listRowSeparator(.hidden)
+                                .listRowInsets(EdgeInsets(top: 6, leading: 16, bottom: 6, trailing: 16))
+                                .swipeActions(edge: .trailing, allowsFullSwipe: true) {
+                                    Button(role: .destructive) {
+                                        let impactFeedback = UIImpactFeedbackGenerator(style: .medium)
+                                        impactFeedback.impactOccurred()
+                                        attemptToDelete = attempt
+                                    } label: {
+                                        Label("Delete", systemImage: "trash")
+                                    }
+                                    .tint(.red)
+                                    .accessibilityLabel("Delete attempt")
+
+                                    Button {
+                                        editingAttempt = attempt
+                                    } label: {
+                                        Label("Edit", systemImage: "pencil")
+                                    }
+                                    .tint(.indigo)
+                                    .accessibilityLabel("Edit attempt")
+                                }
+                                .onTapGesture {
+                                    editingAttempt = attempt
+                                }
+                        }
+                    }
+                } header: {
+                    Text("Attempts (\(attemptsWithProblems.count))")
+                        .font(.title2)
+                        .fontWeight(.bold)
+                        .foregroundColor(.primary)
+                        .textCase(nil)
+                        .padding(.bottom, 8)
+                        .padding(.top, 16)
+                }
+            } else {
+                Text("Session not found")
+                    .foregroundColor(.secondary)
+            }
+        }
+        .listStyle(.plain)
         .navigationTitle("Session Details")
         .navigationBarTitleDisplayMode(.inline)
         .toolbar {
@@ -112,9 +179,9 @@ struct SessionDetailView: View {
                 Button(action: { showingAddAttempt = true }) {
                     Image(systemName: "plus")
                         .font(.title2)
-                        .foregroundColor(.white)
+                        .foregroundColor(.white) // Keep white for contrast on colored button
                         .frame(width: 56, height: 56)
-                        .background(Circle().fill(.blue))
+                        .background(Circle().fill(themeManager.accentColor))
                         .shadow(radius: 4)
                 }
                 .padding()
@@ -162,6 +229,7 @@ struct SessionHeaderCard: View {
     let session: ClimbSession
     let gym: Gym
     let stats: SessionStats
+    @EnvironmentObject var themeManager: ThemeManager
 
     var body: some View {
         VStack(alignment: .leading, spacing: 16) {
@@ -172,7 +240,7 @@ struct SessionHeaderCard: View {
 
                 Text(formatDate(session.date))
                     .font(.title2)
-                    .foregroundColor(.blue)
+                    .foregroundColor(themeManager.accentColor)
 
                 if session.status == .active {
                     if let startTime = session.startTime {
@@ -200,12 +268,12 @@ struct SessionHeaderCard: View {
             // Status indicator
             HStack {
                 Image(systemName: session.status == .active ? "play.fill" : "checkmark.circle.fill")
-                    .foregroundColor(session.status == .active ? .green : .blue)
+                    .foregroundColor(session.status == .active ? .green : themeManager.accentColor)
 
                 Text(session.status == .active ? "In Progress" : "Completed")
                     .font(.subheadline)
                     .fontWeight(.medium)
-                    .foregroundColor(session.status == .active ? .green : .blue)
+                    .foregroundColor(session.status == .active ? .green : themeManager.accentColor)
 
                 Spacer()
             }
@@ -213,7 +281,7 @@ struct SessionHeaderCard: View {
             .padding(.vertical, 6)
             .background(
                 RoundedRectangle(cornerRadius: 8)
-                    .fill((session.status == .active ? Color.green : Color.blue).opacity(0.1))
+                    .fill((session.status == .active ? Color.green : themeManager.accentColor).opacity(0.1))
             )
         }
         .padding()
@@ -264,13 +332,14 @@ struct SessionStatsCard: View {
 struct StatItem: View {
     let label: String
     let value: String
+    @EnvironmentObject var themeManager: ThemeManager
 
     var body: some View {
         VStack(spacing: 4) {
             Text(value)
                 .font(.title2)
                 .fontWeight(.bold)
-                .foregroundColor(.blue)
+                .foregroundColor(themeManager.accentColor)
 
             Text(label)
                 .font(.caption)
@@ -280,85 +349,12 @@ struct StatItem: View {
     }
 }
 
-struct AttemptsSection: View {
-    let attemptsWithProblems: [(Attempt, Problem)]
-    @Binding var attemptToDelete: Attempt?
-    @Binding var editingAttempt: Attempt?
-    @EnvironmentObject var dataManager: ClimbingDataManager
-
-    var body: some View {
-        VStack(alignment: .leading, spacing: 16) {
-            Text("Attempts (\(attemptsWithProblems.count))")
-                .font(.title2)
-                .fontWeight(.bold)
-
-            if attemptsWithProblems.isEmpty {
-                VStack(spacing: 12) {
-                    Image(systemName: "hand.raised.slash")
-                        .font(.title)
-                        .foregroundColor(.secondary)
-
-                    Text("No attempts yet")
-                        .font(.headline)
-                        .foregroundColor(.secondary)
-
-                    Text("Start attempting problems to see your progress!")
-                        .font(.subheadline)
-                        .foregroundColor(.secondary)
-                        .multilineTextAlignment(.center)
-                }
-                .frame(maxWidth: .infinity)
-                .padding()
-                .background(
-                    RoundedRectangle(cornerRadius: 16)
-                        .fill(.regularMaterial)
-                )
-            } else {
-                List {
-                    ForEach(attemptsWithProblems.indices, id: \.self) { index in
-                        let (attempt, problem) = attemptsWithProblems[index]
-                        AttemptCard(attempt: attempt, problem: problem)
-                            .listRowBackground(Color.clear)
-                            .listRowSeparator(.hidden)
-                            .listRowInsets(EdgeInsets(top: 6, leading: 0, bottom: 6, trailing: 0))
-                            .swipeActions(edge: .trailing, allowsFullSwipe: true) {
-                                Button(role: .destructive) {
-                                    // Add haptic feedback for delete action
-                                    let impactFeedback = UIImpactFeedbackGenerator(style: .medium)
-                                    impactFeedback.impactOccurred()
-                                    attemptToDelete = attempt
-                                } label: {
-                                    Label("Delete", systemImage: "trash")
-                                }
-                                .accessibilityLabel("Delete attempt")
-                                .accessibilityHint("Removes this attempt from the session")
-
-                                Button {
-                                    editingAttempt = attempt
-                                } label: {
-                                    Label("Edit", systemImage: "pencil")
-                                }
-                                .tint(.blue)
-                                .accessibilityLabel("Edit attempt")
-                                .accessibilityHint("Modify the details of this attempt")
-                            }
-                            .onTapGesture {
-                                editingAttempt = attempt
-                            }
-                    }
-                }
-                .listStyle(.plain)
-                .scrollDisabled(true)
-                .frame(height: CGFloat(attemptsWithProblems.count) * 120)
-            }
-        }
-
-    }
-}
+// AttemptsSection removed as it is now integrated into the main List
 
 struct AttemptCard: View {
     let attempt: Attempt
     let problem: Problem
+    @EnvironmentObject var themeManager: ThemeManager
 
     var body: some View {
         VStack(alignment: .leading, spacing: 12) {
@@ -370,7 +366,7 @@ struct AttemptCard: View {
 
                     Text("\(problem.difficulty.system.displayName): \(problem.difficulty.grade)")
                         .font(.subheadline)
-                        .foregroundColor(.blue)
+                        .foregroundColor(themeManager.accentColor)
 
                     if let location = problem.location {
                         Text(location)
@@ -399,9 +395,11 @@ struct AttemptCard: View {
             }
         }
         .padding()
-        .background(.regularMaterial)
-        .cornerRadius(12)
-        .shadow(radius: 2)
+        .background(
+            RoundedRectangle(cornerRadius: 12)
+                .fill(Color(uiColor: .secondarySystemGroupedBackground)) // Better contrast in light mode
+                .shadow(color: .black.opacity(0.05), radius: 2, x: 0, y: 1)
+        )
     }
 }
 

ios/Ascently/Views/GymsView.swift

@@ -2,6 +2,7 @@ import SwiftUI
 
 struct GymsView: View {
     @EnvironmentObject var dataManager: ClimbingDataManager
+    @EnvironmentObject var themeManager: ThemeManager
     @State private var showingAddGym = false
 
     var body: some View {
@@ -19,7 +20,7 @@ struct GymsView: View {
                     if dataManager.isSyncing {
                         HStack(spacing: 2) {
                             ProgressView()
-                                .progressViewStyle(CircularProgressViewStyle(tint: .blue))
+                                .progressViewStyle(CircularProgressViewStyle(tint: themeManager.accentColor))
                                 .scaleEffect(0.6)
                         }
                         .padding(.horizontal, 6)
@@ -48,6 +49,7 @@ struct GymsView: View {
 
 struct GymsList: View {
     @EnvironmentObject var dataManager: ClimbingDataManager
+    @EnvironmentObject var themeManager: ThemeManager
     @State private var gymToDelete: Gym?
     @State private var gymToEdit: Gym?
 
@@ -62,6 +64,7 @@ struct GymsList: View {
                 } label: {
                     Label("Delete", systemImage: "trash")
                 }
+                .tint(.red)
 
                 Button {
                     gymToEdit = gym
@@ -71,7 +74,7 @@ struct GymsList: View {
                         Text("Edit")
                     }
                 }
-                .tint(.blue)
+                .tint(.indigo)
             }
         }
         .alert("Delete Gym", isPresented: .constant(gymToDelete != nil)) {
@@ -98,6 +101,7 @@ struct GymsList: View {
 struct GymRow: View {
     let gym: Gym
     @EnvironmentObject var dataManager: ClimbingDataManager
+    @EnvironmentObject var themeManager: ThemeManager
 
     private var problemCount: Int {
         dataManager.problems(forGym: gym.id).count
@@ -133,9 +137,9 @@ struct GymRow: View {
                                 .padding(.vertical, 4)
                                 .background(
                                     RoundedRectangle(cornerRadius: 8)
-                                        .fill(.blue.opacity(0.1))
+                                        .fill(themeManager.accentColor.opacity(0.1))
                                 )
-                                .foregroundColor(.blue)
+                                .foregroundColor(themeManager.accentColor)
                         }
                     }
                 }

ios/Ascently/Views/LiveActivityDebugView.swift

@@ -196,7 +196,7 @@ struct LiveActivityDebugView: View {
         }
 
         isTestRunning = true
-        appendDebugOutput("🧪 Starting Live Activity test...")
+        appendDebugOutput("Starting Live Activity test...")
 
         Task {
             defer {

ios/Ascently/Views/ProblemsView.swift

@@ -2,15 +2,22 @@ import SwiftUI
 
 struct ProblemsView: View {
     @EnvironmentObject var dataManager: ClimbingDataManager
+    @EnvironmentObject var themeManager: ThemeManager
     @State private var showingAddProblem = false
     @State private var selectedClimbType: ClimbType?
     @State private var selectedGym: Gym?
     @State private var searchText = ""
     @State private var showingSearch = false
+    @State private var showingFilters = false
     @FocusState private var isSearchFocused: Bool
 
     @State private var cachedFilteredProblems: [Problem] = []
 
+    // State moved from ProblemsList
+    @State private var problemToDelete: Problem?
+    @State private var problemToEdit: Problem?
+    @State private var animationKey = 0
+
     private func updateFilteredProblems() {
         Task(priority: .userInitiated) {
             let result = await computeFilteredProblems()
@@ -70,61 +77,68 @@ struct ProblemsView: View {
     var body: some View {
         NavigationStack {
             Group {
-                VStack(spacing: 0) {
-                    if showingSearch {
-                        HStack(spacing: 8) {
-                            Image(systemName: "magnifyingglass")
-                                .foregroundColor(.secondary)
-                                .font(.system(size: 16, weight: .medium))
-
-                            TextField("Search problems...", text: $searchText)
-                                .textFieldStyle(.plain)
-                                .font(.system(size: 16))
-                                .focused($isSearchFocused)
-                                .submitLabel(.search)
-                        }
-                        .padding(.horizontal, 12)
-                        .padding(.vertical, 10)
-                        .background {
-                            if #available(iOS 18.0, *) {
-                                RoundedRectangle(cornerRadius: 12)
-                                    .fill(.regularMaterial)
-                                    .overlay {
-                                        RoundedRectangle(cornerRadius: 12)
-                                            .stroke(.quaternary, lineWidth: 0.5)
-                                    }
-                            } else {
-                                RoundedRectangle(cornerRadius: 10)
-                                    .fill(Color(.systemGray6))
-                                    .overlay {
-                                        RoundedRectangle(cornerRadius: 10)
-                                            .stroke(Color(.systemGray4), lineWidth: 0.5)
-                                    }
-                            }
-                        }
-                        .padding(.horizontal)
-                        .padding(.top, 8)
-                        .animation(.easeInOut(duration: 0.3), value: showingSearch)
-                    }
-
-                    if !dataManager.problems.isEmpty && !showingSearch {
-                        FilterSection(
-                            selectedClimbType: $selectedClimbType,
-                            selectedGym: $selectedGym,
-                            filteredProblems: cachedFilteredProblems
-                        )
-                        .padding()
-                        .background(.regularMaterial)
-                    }
-
-                    if cachedFilteredProblems.isEmpty {
+                if cachedFilteredProblems.isEmpty {
+                    VStack(spacing: 0) {
+                        headerContent
+                        
                         EmptyProblemsView(
                             isEmpty: dataManager.problems.isEmpty,
                             isFiltered: !dataManager.problems.isEmpty
                         )
-                    } else {
-                        ProblemsList(problems: cachedFilteredProblems)
                     }
+                } else {
+                    List {
+                        if showingSearch {
+                            Section {
+                                headerContent
+                            }
+                            .listRowInsets(EdgeInsets())
+                            .listRowSeparator(.hidden)
+                            .listRowBackground(Color.clear)
+                        }
+
+                        ForEach(cachedFilteredProblems) { problem in
+                            NavigationLink(destination: ProblemDetailView(problemId: problem.id)) {
+                                ProblemRow(problem: problem)
+                            }
+                            .swipeActions(edge: .trailing, allowsFullSwipe: false) {
+                                Button(role: .destructive) {
+                                    problemToDelete = problem
+                                } label: {
+                                    Label("Delete", systemImage: "trash")
+                                }
+                                .tint(.red)
+
+                                Button {
+                                    withAnimation(.spring(response: 0.5, dampingFraction: 0.8, blendDuration: 0.1))
+                                    {
+                                        let updatedProblem = problem.updated(isActive: !problem.isActive)
+                                        dataManager.updateProblem(updatedProblem)
+                                    }
+                                } label: {
+                                    Label(
+                                        problem.isActive ? "Mark as Reset" : "Mark as Active",
+                                        systemImage: problem.isActive ? "xmark.circle" : "checkmark.circle")
+                                }
+                                .tint(.orange)
+
+                                Button {
+                                    problemToEdit = problem
+                                } label: {
+                                    HStack {
+                                        Image(systemName: "pencil")
+                                        Text("Edit")
+                                    }
+                                }
+                                .tint(.indigo)
+                            }
+                        }
+                    }
+                    .listStyle(.plain)
+                    .animation(
+                        .spring(response: 0.5, dampingFraction: 0.8, blendDuration: 0.1),
+                        value: animationKey
+                    )
                 }
             }
             .navigationTitle("Problems")
@@ -134,7 +148,7 @@ struct ProblemsView: View {
                     if dataManager.isSyncing {
                         HStack(spacing: 2) {
                             ProgressView()
-                                .progressViewStyle(CircularProgressViewStyle(tint: .blue))
+                                .progressViewStyle(CircularProgressViewStyle(tint: themeManager.accentColor))
                                 .scaleEffect(0.6)
                         }
                         .padding(.horizontal, 6)
@@ -162,7 +176,15 @@ struct ProblemsView: View {
                     }) {
                         Image(systemName: showingSearch ? "xmark.circle.fill" : "magnifyingglass")
                             .font(.system(size: 16, weight: .medium))
-                            .foregroundColor(showingSearch ? .secondary : .blue)
+                            .foregroundColor(showingSearch ? .secondary : themeManager.accentColor)
+                    }
+
+                    Button(action: {
+                        showingFilters = true
+                    }) {
+                        Image(systemName: (selectedClimbType != nil || selectedGym != nil) ? "line.3.horizontal.decrease.circle.fill" : "line.3.horizontal.decrease.circle")
+                            .font(.system(size: 16, weight: .medium))
+                            .foregroundColor(themeManager.accentColor)
                     }
 
                     if !dataManager.gyms.isEmpty {
@@ -175,6 +197,32 @@ struct ProblemsView: View {
             .sheet(isPresented: $showingAddProblem) {
                 AddEditProblemView()
             }
+            .sheet(isPresented: $showingFilters) {
+                FilterSheet(
+                    selectedClimbType: $selectedClimbType,
+                    selectedGym: $selectedGym,
+                    filteredProblems: cachedFilteredProblems
+                )
+                .presentationDetents([.height(320)])
+            }
+            .sheet(item: $problemToEdit) { problem in
+                AddEditProblemView(problemId: problem.id)
+            }
+            .alert("Delete Problem", isPresented: .constant(problemToDelete != nil)) {
+                Button("Cancel", role: .cancel) {
+                    problemToDelete = nil
+                }
+                Button("Delete", role: .destructive) {
+                    if let problem = problemToDelete {
+                        dataManager.deleteProblem(problem)
+                        problemToDelete = nil
+                    }
+                }
+            } message: {
+                Text(
+                    "Are you sure you want to delete this problem? This will also delete all associated attempts."
+                )
+            }
         }
         .onAppear {
             updateFilteredProblems()
@@ -191,11 +239,57 @@ struct ProblemsView: View {
         .onChange(of: selectedGym) {
             updateFilteredProblems()
         }
+        .onChange(of: cachedFilteredProblems) {
+            animationKey += 1
+        }
+    }
+
+    @ViewBuilder
+    private var headerContent: some View {
+        VStack(spacing: 0) {
+            if showingSearch {
+                HStack(spacing: 8) {
+                    Image(systemName: "magnifyingglass")
+                        .foregroundColor(.secondary)
+                        .font(.system(size: 16, weight: .medium))
+
+                    TextField("Search problems...", text: $searchText)
+                        .textFieldStyle(.plain)
+                        .font(.system(size: 16))
+                        .focused($isSearchFocused)
+                        .submitLabel(.search)
+                }
+                .padding(.horizontal, 12)
+                .padding(.vertical, 10)
+                .background {
+                    if #available(iOS 18.0, *) {
+                        RoundedRectangle(cornerRadius: 12)
+                            .fill(.regularMaterial)
+                            .overlay {
+                                RoundedRectangle(cornerRadius: 12)
+                                    .stroke(.quaternary, lineWidth: 0.5)
+                            }
+                    } else {
+                        RoundedRectangle(cornerRadius: 10)
+                            .fill(Color(.systemGray6))
+                            .overlay {
+                                RoundedRectangle(cornerRadius: 10)
+                                    .stroke(Color(.systemGray4), lineWidth: 0.5)
+                            }
+                    }
+                }
+                .padding(.horizontal)
+                .padding(.top, 8)
+                .padding(.bottom, 8)
+                .animation(.easeInOut(duration: 0.3), value: showingSearch)
+            }
+        }
     }
 }
 
 struct FilterSection: View {
     @EnvironmentObject var dataManager: ClimbingDataManager
+    @EnvironmentObject var themeManager: ThemeManager
     @Binding var selectedClimbType: ClimbType?
     @Binding var selectedGym: Gym?
     let filteredProblems: [Problem]
@@ -278,6 +372,7 @@ struct FilterChip: View {
     let title: String
     let isSelected: Bool
     let action: () -> Void
+    @EnvironmentObject var themeManager: ThemeManager
 
     var body: some View {
         Button(action: action) {
@@ -288,94 +383,21 @@ struct FilterChip: View {
                 .padding(.vertical, 6)
                 .background(
                     RoundedRectangle(cornerRadius: 16)
-                        .fill(isSelected ? .blue : .clear)
-                        .stroke(.blue, lineWidth: 1)
+                        .fill(isSelected ? themeManager.accentColor : .clear)
+                        .stroke(themeManager.accentColor, lineWidth: 1)
                 )
-                .foregroundColor(isSelected ? .white : .blue)
+                .foregroundColor(isSelected ? themeManager.contrastingTextColor : themeManager.accentColor)
         }
         .buttonStyle(.plain)
     }
 }
 
-struct ProblemsList: View {
-    let problems: [Problem]
-    @EnvironmentObject var dataManager: ClimbingDataManager
-    @State private var problemToDelete: Problem?
-    @State private var problemToEdit: Problem?
-    @State private var animationKey = 0
 
-    var body: some View {
-        List(problems, id: \.id) { problem in
-            NavigationLink(destination: ProblemDetailView(problemId: problem.id)) {
-                ProblemRow(problem: problem)
-            }
-            .swipeActions(edge: .trailing, allowsFullSwipe: false) {
-                Button(role: .destructive) {
-                    problemToDelete = problem
-                } label: {
-                    Label("Delete", systemImage: "trash")
-                }
-
-                Button {
-                    // Use a spring animation for more natural movement
-                    withAnimation(.spring(response: 0.5, dampingFraction: 0.8, blendDuration: 0.1))
-                    {
-                        let updatedProblem = problem.updated(isActive: !problem.isActive)
-                        dataManager.updateProblem(updatedProblem)
-                    }
-                } label: {
-                    Label(
-                        problem.isActive ? "Mark as Reset" : "Mark as Active",
-                        systemImage: problem.isActive ? "xmark.circle" : "checkmark.circle")
-                }
-                .tint(.orange)
-
-                Button {
-                    problemToEdit = problem
-                } label: {
-                    HStack {
-                        Image(systemName: "pencil")
-                        Text("Edit")
-                    }
-                }
-                .tint(.blue)
-            }
-        }
-        .animation(
-            .spring(response: 0.5, dampingFraction: 0.8, blendDuration: 0.1),
-            value: animationKey
-        )
-        .onChange(of: problems) {
-            animationKey += 1
-        }
-        .listStyle(.plain)
-        .scrollContentBackground(.hidden)
-        .scrollIndicators(.hidden)
-        .clipped()
-        .alert("Delete Problem", isPresented: .constant(problemToDelete != nil)) {
-            Button("Cancel", role: .cancel) {
-                problemToDelete = nil
-            }
-            Button("Delete", role: .destructive) {
-                if let problem = problemToDelete {
-                    dataManager.deleteProblem(problem)
-                    problemToDelete = nil
-                }
-            }
-        } message: {
-            Text(
-                "Are you sure you want to delete this problem? This will also delete all associated attempts."
-            )
-        }
-        .sheet(item: $problemToEdit) { problem in
-            AddEditProblemView(problemId: problem.id)
-        }
-    }
-}
 
 struct ProblemRow: View {
     let problem: Problem
     @EnvironmentObject var dataManager: ClimbingDataManager
+    @EnvironmentObject var themeManager: ThemeManager
 
     private var gym: Gym? {
         dataManager.gym(withId: problem.gymId)
@@ -408,7 +430,7 @@ struct ProblemRow: View {
                         if !problem.imagePaths.isEmpty {
                             Image(systemName: "photo")
                                 .font(.system(size: 14, weight: .medium))
-                                .foregroundColor(.blue)
+                                .foregroundColor(themeManager.accentColor)
                         }
 
                         if isCompleted {
@@ -420,7 +442,7 @@ struct ProblemRow: View {
                         Text(problem.difficulty.grade)
                             .font(.title2)
                             .fontWeight(.bold)
-                            .foregroundColor(.blue)
+                            .foregroundColor(themeManager.accentColor)
                     }
 
                     Text(problem.climbType.displayName)
@@ -445,9 +467,9 @@ struct ProblemRow: View {
                                 .padding(.vertical, 2)
                                 .background(
                                     RoundedRectangle(cornerRadius: 4)
-                                        .fill(.blue.opacity(0.1))
+                                        .fill(themeManager.accentColor.opacity(0.1))
                                 )
-                                .foregroundColor(.blue)
+                                .foregroundColor(themeManager.accentColor)
                         }
                     }
                 }
@@ -524,6 +546,71 @@ struct EmptyProblemsView: View {
     }
 }
 
+struct FilterSheet: View {
+    @Binding var selectedClimbType: ClimbType?
+    @Binding var selectedGym: Gym?
+    let filteredProblems: [Problem]
+    @Environment(\.dismiss) var dismiss
+    @EnvironmentObject var themeManager: ThemeManager
+    
+    var body: some View {
+        NavigationStack {
+            ScrollView {
+                FilterSection(
+                    selectedClimbType: $selectedClimbType,
+                    selectedGym: $selectedGym,
+                    filteredProblems: filteredProblems
+                )
+                .padding()
+            }
+            .navigationTitle("Filters")
+            .navigationBarTitleDisplayMode(.inline)
+            .toolbar {
+                ToolbarItem(placement: .navigationBarTrailing) {
+                    Button(action: {
+                        dismiss()
+                    }) {
+                        Text("Done")
+                            .font(.subheadline)
+                            .fontWeight(.semibold)
+                            .padding(.horizontal, 16)
+                            .padding(.vertical, 6)
+                            .background(.ultraThinMaterial)
+                            .clipShape(Capsule())
+                            .overlay(
+                                Capsule()
+                                    .stroke(Color.secondary.opacity(0.2), lineWidth: 0.5)
+                            )
+                            .foregroundColor(themeManager.accentColor)
+                    }
+                }
+                
+                ToolbarItem(placement: .navigationBarLeading) {
+                    if selectedClimbType != nil || selectedGym != nil {
+                        Button(action: {
+                            selectedClimbType = nil
+                            selectedGym = nil
+                        }) {
+                            Text("Reset")
+                                .font(.subheadline)
+                                .fontWeight(.medium)
+                                .padding(.horizontal, 16)
+                                .padding(.vertical, 6)
+                                .background(.ultraThinMaterial)
+                                .clipShape(Capsule())
+                                .overlay(
+                                    Capsule()
+                                        .stroke(Color.secondary.opacity(0.2), lineWidth: 0.5)
+                                )
+                                .foregroundColor(.red)
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+
 #Preview {
     ProblemsView()
         .environmentObject(ClimbingDataManager.preview)

ios/Ascently/Views/SessionsView.swift

@@ -142,6 +142,7 @@ struct SessionsList: View {
                             } label: {
                                 Label("Delete", systemImage: "trash")
                             }
+                            .tint(.red)
                         }
                     }
                 } header: {

ios/Ascently/Views/SettingsView.swift

@@ -9,6 +9,7 @@ enum SheetType {
 
 struct SettingsView: View {
     @EnvironmentObject var dataManager: ClimbingDataManager
+    @EnvironmentObject var themeManager: ThemeManager
     @State private var activeSheet: SheetType?
 
     var body: some View {
@@ -20,6 +21,8 @@ struct SettingsView: View {
                 HealthKitSection()
                     .environmentObject(dataManager.healthKitService)
 
+                AppearanceSection()
+
                 DataManagementSection(
                     activeSheet: $activeSheet
                 )
@@ -75,8 +78,90 @@ extension SheetType: Identifiable {
     }
 }
 
+struct AppearanceSection: View {
+    @EnvironmentObject var themeManager: ThemeManager
+    
+    let columns = [
+        GridItem(.adaptive(minimum: 44))
+    ]
+    
+    var body: some View {
+        Section("Appearance") {
+            VStack(alignment: .leading, spacing: 12) {
+                Text("Accent Color")
+                    .font(.caption)
+                    .foregroundColor(.secondary)
+                    .textCase(.uppercase)
+                
+                LazyVGrid(columns: columns, spacing: 12) {
+                    ForEach(ThemeManager.presetColors, id: \.self) { color in
+                        Circle()
+                            .fill(color)
+                            .frame(width: 44, height: 44)
+                            .overlay(
+                                ZStack {
+                                    if isSelected(color) {
+                                        Image(systemName: "checkmark")
+                                            .font(.headline)
+                                            .foregroundColor(.white)
+                                            .shadow(radius: 1)
+                                    }
+                                }
+                            )
+                            .onTapGesture {
+                                withAnimation {
+                                    themeManager.accentColor = color
+                                }
+                            }
+                            .accessibilityLabel(colorDescription(for: color))
+                            .accessibilityAddTraits(isSelected(color) ? .isSelected : [])
+                    }
+                }
+                .padding(.vertical, 8)
+            }
+            
+            if !isSelected(.blue) {
+                Button("Reset to Default") {
+                    withAnimation {
+                        themeManager.resetToDefault()
+                    }
+                }
+                .foregroundColor(.red)
+            }
+        }
+    }
+    
+    private func isSelected(_ color: Color) -> Bool {
+        // Compare using UIColor to handle different Color initializers
+        let selectedUIColor = UIColor(themeManager.accentColor)
+        let targetUIColor = UIColor(color)
+        
+        // Simple equality check might fail for some system colors, so we check components if needed
+        // But usually UIColor equality is robust enough for system colors
+        return selectedUIColor == targetUIColor
+    }
+    
+    private func colorDescription(for color: Color) -> String {
+        switch color {
+        case .blue: return "Blue"
+        case .purple: return "Purple"
+        case .pink: return "Pink"
+        case .red: return "Red"
+        case .orange: return "Orange"
+        case .green: return "Green"
+        case .teal: return "Teal"
+        case .indigo: return "Indigo"
+        case .mint: return "Mint"
+        case Color(uiColor: .systemBrown): return "Brown"
+        case Color(uiColor: .systemCyan): return "Cyan"
+        default: return "Color"
+        }
+    }
+}
+
 struct DataManagementSection: View {
     @EnvironmentObject var dataManager: ClimbingDataManager
+    @EnvironmentObject var themeManager: ThemeManager
     @Binding var activeSheet: SheetType?
     @State private var showingResetAlert = false
     @State private var isExporting = false
@@ -84,6 +169,8 @@ struct DataManagementSection: View {
     @State private var isDeletingImages = false
     @State private var showingDeleteImagesAlert = false
 
+    private static let logTag = "DataManagementSection"
+
     var body: some View {
         Section("Data Management") {
             // Export Data
@@ -98,7 +185,7 @@ struct DataManagementSection: View {
                             .foregroundColor(.secondary)
                     } else {
                         Image(systemName: "square.and.arrow.up")
-                            .foregroundColor(.blue)
+                            .foregroundColor(themeManager.accentColor)
                         Text("Export Data")
                     }
                     Spacer()
@@ -217,13 +304,14 @@ struct DataManagementSection: View {
                     try fileManager.removeItem(at: imageFile)
                     deletedCount += 1
                 } catch {
-                    print("Failed to delete image: \(imageFile.lastPathComponent)")
+                    AppLogger.error(
+                        "Failed to delete image: \(imageFile.lastPathComponent)", tag: Self.logTag)
                 }
             }
 
-            print("Deleted \(deletedCount) image files")
+            AppLogger.info("Deleted \(deletedCount) image files", tag: Self.logTag)
         } catch {
-            print("Failed to access images directory: \(error)")
+            AppLogger.error("Failed to access images directory: \(error)", tag: Self.logTag)
         }
 
         // Delete all images from backup directory
@@ -235,7 +323,7 @@ struct DataManagementSection: View {
                 try? fileManager.removeItem(at: backupFile)
             }
         } catch {
-            print("Failed to access backup directory: \(error)")
+            AppLogger.error("Failed to access backup directory: \(error)", tag: Self.logTag)
         }
 
         // Clear image paths from all problems
@@ -250,6 +338,7 @@ struct DataManagementSection: View {
 }
 
 struct AppInfoSection: View {
+    @EnvironmentObject var themeManager: ThemeManager
     private var appVersion: String {
         Bundle.main.infoDictionary?["CFBundleShortVersionString"] as? String ?? "Unknown"
     }
@@ -260,23 +349,9 @@ struct AppInfoSection: View {
 
     var body: some View {
         Section("App Information") {
-            HStack {
-                Image("AppLogo")
-                    .resizable()
-                    .frame(width: 24, height: 24)
-                VStack(alignment: .leading) {
-                    Text("Ascently")
-                        .font(.headline)
-                    Text("Track your climbing progress")
-                        .font(.caption)
-                        .foregroundColor(.secondary)
-                }
-                Spacer()
-            }
-
             HStack {
                 Image(systemName: "info.circle")
-                    .foregroundColor(.blue)
+                    .foregroundColor(themeManager.accentColor)
                 Text("Version")
                 Spacer()
                 Text("\(appVersion) (\(buildNumber))")
@@ -289,18 +364,21 @@ struct AppInfoSection: View {
 struct ExportDataView: View {
     let data: Data
     @Environment(\.dismiss) private var dismiss
+    @EnvironmentObject var themeManager: ThemeManager
     @State private var tempFileURL: URL?
     @State private var isCreatingFile = true
 
+    private static let logTag = "ExportDataView"
+
     var body: some View {
         NavigationStack {
             VStack(spacing: 30) {
                 if isCreatingFile {
-                    // Loading state - more prominent
+                    // Loading state
                     VStack(spacing: 20) {
                         ProgressView()
                             .scaleEffect(1.5)
-                            .tint(.blue)
+                            .tint(themeManager.accentColor)
 
                         Text("Preparing Your Export")
                             .font(.title2)
@@ -339,12 +417,12 @@ struct ExportDataView: View {
                             ) {
                                 Label("Share Data", systemImage: "square.and.arrow.up")
                                     .font(.headline)
-                                    .foregroundColor(.white)
+                                    .foregroundColor(themeManager.contrastingTextColor)
                                     .frame(maxWidth: .infinity)
                                     .padding()
                                     .background(
                                         RoundedRectangle(cornerRadius: 12)
-                                            .fill(.blue)
+                                            .fill(themeManager.accentColor)
                                     )
                             }
                             .padding(.horizontal)
@@ -380,6 +458,7 @@ struct ExportDataView: View {
     }
 
     private func createTempFile() {
+        let logTag = Self.logTag  // Capture before entering background queue
         DispatchQueue.global(qos: .userInitiated).async {
             do {
                 let formatter = ISO8601DateFormatter()
@@ -394,7 +473,9 @@ struct ExportDataView: View {
                         for: .documentDirectory, in: .userDomainMask
                     ).first
                 else {
-                    print("Could not access Documents directory")
+                    Task { @MainActor in
+                        AppLogger.error("Could not access Documents directory", tag: logTag)
+                    }
                     DispatchQueue.main.async {
                         self.isCreatingFile = false
                     }
@@ -410,7 +491,9 @@ struct ExportDataView: View {
                     self.isCreatingFile = false
                 }
             } catch {
-                print("Failed to create export file: \(error)")
+                Task { @MainActor in
+                    AppLogger.error("Failed to create export file: \(error)", tag: logTag)
+                }
                 DispatchQueue.main.async {
                     self.isCreatingFile = false
                 }
@@ -420,10 +503,12 @@ struct ExportDataView: View {
 
     private func cleanupTempFile() {
         if let fileURL = tempFileURL {
+            let logTag = Self.logTag  // Capture before entering async closure
             // Clean up after a delay to ensure sharing is complete
             DispatchQueue.main.asyncAfter(deadline: .now() + 5.0) {
                 try? FileManager.default.removeItem(at: fileURL)
-                print("Cleaned up export file: \(fileURL.lastPathComponent)")
+                AppLogger.debug(
+                    "Cleaned up export file: \(fileURL.lastPathComponent)", tag: logTag)
             }
         }
     }
@@ -432,9 +517,12 @@ struct ExportDataView: View {
 struct SyncSection: View {
     @EnvironmentObject var syncService: SyncService
     @EnvironmentObject var dataManager: ClimbingDataManager
+    @EnvironmentObject var themeManager: ThemeManager
     @State private var showingSyncSettings = false
     @State private var showingDisconnectAlert = false
 
+    private static let logTag = "SyncSection"
+
     var body: some View {
         Section("Sync") {
             // Sync Status
@@ -475,7 +563,7 @@ struct SyncSection: View {
             }) {
                 HStack {
                     Image(systemName: "gear")
-                        .foregroundColor(.blue)
+                        .foregroundColor(themeManager.accentColor)
                     Text("Configure Server")
                     Spacer()
                     Image(systemName: "chevron.right")
@@ -579,11 +667,14 @@ struct SyncSection: View {
     }
 
     private func performSync() {
+        let logTag = Self.logTag  // Capture before entering async context
         Task {
             do {
                 try await syncService.syncWithServer(dataManager: dataManager)
             } catch {
-                print("Sync failed: \(error)")
+                await MainActor.run {
+                    AppLogger.error("Sync failed: \(error)", tag: logTag)
+                }
             }
         }
     }
@@ -591,6 +682,7 @@ struct SyncSection: View {
 
 struct SyncSettingsView: View {
     @EnvironmentObject var syncService: SyncService
+    @EnvironmentObject var themeManager: ThemeManager
     @Environment(\.dismiss) private var dismiss
     @State private var serverURL: String = ""
     @State private var authToken: String = ""
@@ -641,7 +733,7 @@ struct SyncSettingsView: View {
                                     .foregroundColor(.secondary)
                             } else {
                                 Image(systemName: "network")
-                                    .foregroundColor(.blue)
+                                    .foregroundColor(themeManager.accentColor)
                                 Text("Test Connection")
                                 Spacer()
                                 if syncService.isConnected {
@@ -702,6 +794,12 @@ struct SyncSettingsView: View {
 
                         syncService.serverURL = newURL
                         syncService.authToken = newToken
+                        
+                        // Ensure provider type is set to server
+                        if syncService.providerType != .server {
+                            syncService.providerType = .server
+                        }
+                        
                         dismiss()
                     }
                     .fontWeight(.semibold)
@@ -742,6 +840,13 @@ struct SyncSettingsView: View {
 
         Task {
             do {
+                // Ensure we are using the server provider
+                await MainActor.run {
+                    if syncService.providerType != .server {
+                        syncService.providerType = .server
+                    }
+                }
+
                 // Temporarily set the values for testing
                 syncService.serverURL = testURL
                 syncService.authToken = testToken

ios/SessionStatusLive/SessionStatusLiveBundle.swift

@@ -8,7 +8,6 @@ import WidgetKit
 struct SessionStatusLiveBundle: WidgetBundle {
     var body: some Widget {
         SessionStatusLive()
-        SessionStatusLiveControl()
         SessionStatusLiveLiveActivity()
     }
 }

ios/SessionStatusLive/SessionStatusLiveControl.swift

@@ -1,74 +0,0 @@
-//
-//  SessionStatusLiveControl.swift
-
-import AppIntents
-import SwiftUI
-import WidgetKit
-
-struct SessionStatusLiveControl: ControlWidget {
-    static let kind: String = "com.atridad.Ascently.SessionStatusLive"
-
-    var body: some ControlWidgetConfiguration {
-        AppIntentControlConfiguration(
-            kind: Self.kind,
-            provider: Provider()
-        ) { value in
-            ControlWidgetToggle(
-                "Start Timer",
-                isOn: value.isRunning,
-                action: StartTimerIntent(value.name)
-            ) { isRunning in
-                Label(isRunning ? "On" : "Off", systemImage: "timer")
-            }
-        }
-        .displayName("Timer")
-        .description("A an example control that runs a timer.")
-    }
-}
-
-extension SessionStatusLiveControl {
-    struct Value {
-        var isRunning: Bool
-        var name: String
-    }
-
-    struct Provider: AppIntentControlValueProvider {
-        func previewValue(configuration: TimerConfiguration) -> Value {
-            SessionStatusLiveControl.Value(isRunning: false, name: configuration.timerName)
-        }
-
-        func currentValue(configuration: TimerConfiguration) async throws -> Value {
-            let isRunning = true  // Check if the timer is running
-            return SessionStatusLiveControl.Value(
-                isRunning: isRunning, name: configuration.timerName)
-        }
-    }
-}
-
-struct TimerConfiguration: ControlConfigurationIntent {
-    static let title: LocalizedStringResource = "Timer Name Configuration"
-
-    @Parameter(title: "Timer Name", default: "Timer")
-    var timerName: String
-}
-
-struct StartTimerIntent: SetValueIntent {
-    static let title: LocalizedStringResource = "Start a timer"
-
-    @Parameter(title: "Timer Name")
-    var name: String
-
-    @Parameter(title: "Timer is running")
-    var value: Bool
-
-    init() {}
-
-    init(_ name: String) {
-        self.name = name
-    }
-
-    func perform() async throws -> some IntentResult {
-        // Start the timer…
-        return .result()
-    }
-}

sync/main.go

@@ -13,7 +13,7 @@ import (
 	"time"
 )
 
-const VERSION = "2.1.0"
+const VERSION = "2.3.0"
 
 func min(a, b int) int {
 	if a < b {
@@ -283,8 +283,16 @@ func (s *SyncServer) mergeDeletedItems(existing []DeletedItem, updates []Deleted
 		}
 	}
 
+	// Clean up tombstones older than 30 days to prevent unbounded growth
+	cutoffTime := time.Now().UTC().Add(-30 * 24 * time.Hour)
 	result := make([]DeletedItem, 0, len(deletedMap))
 	for _, item := range deletedMap {
+		deletedTime, err := time.Parse(time.RFC3339, item.DeletedAt)
+		if err == nil && deletedTime.Before(cutoffTime) {
+			log.Printf("Cleaning up old deletion record: type=%s, id=%s, deletedAt=%s",
+				item.Type, item.ID, item.DeletedAt)
+			continue
+		}
 		result = append(result, item)
 	}
 	return result
@@ -533,15 +541,16 @@ func (s *SyncServer) handleDeltaSync(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	// Merge and apply deletions first to prevent resurrection
+	serverBackup.DeletedItems = s.mergeDeletedItems(serverBackup.DeletedItems, deltaRequest.DeletedItems)
+	s.applyDeletions(serverBackup, serverBackup.DeletedItems)
+	log.Printf("Applied deletions: total=%d deletion records", len(serverBackup.DeletedItems))
+
 	// Merge client changes into server data
 	serverBackup.Gyms = s.mergeGyms(serverBackup.Gyms, deltaRequest.Gyms)
 	serverBackup.Problems = s.mergeProblems(serverBackup.Problems, deltaRequest.Problems)
 	serverBackup.Sessions = s.mergeSessions(serverBackup.Sessions, deltaRequest.Sessions)
 	serverBackup.Attempts = s.mergeAttempts(serverBackup.Attempts, deltaRequest.Attempts)
-	serverBackup.DeletedItems = s.mergeDeletedItems(serverBackup.DeletedItems, deltaRequest.DeletedItems)
-
-	// Apply deletions to remove deleted items
-	s.applyDeletions(serverBackup, serverBackup.DeletedItems)
 
 	// Save merged data
 	if err := s.saveData(serverBackup); err != nil {
@@ -553,8 +562,15 @@ func (s *SyncServer) handleDeltaSync(w http.ResponseWriter, r *http.Request) {
 	// Parse client's last sync time
 	clientLastSync, err := time.Parse(time.RFC3339, deltaRequest.LastSyncTime)
 	if err != nil {
-		// If parsing fails, send everything
 		clientLastSync = time.Time{}
+		log.Printf("Warning: Could not parse lastSyncTime '%s', sending all data", deltaRequest.LastSyncTime)
+	}
+
+	// Build deleted item lookup map
+	deletedItemMap := make(map[string]bool)
+	for _, item := range serverBackup.DeletedItems {
+		key := item.Type + ":" + item.ID
+		deletedItemMap[key] = true
 	}
 
 	// Prepare response with items modified since client's last sync
@@ -569,6 +585,9 @@ func (s *SyncServer) handleDeltaSync(w http.ResponseWriter, r *http.Request) {
 
 	// Filter gyms modified after client's last sync
 	for _, gym := range serverBackup.Gyms {
+		if deletedItemMap["gym:"+gym.ID] {
+			continue
+		}
 		gymTime, err := time.Parse(time.RFC3339, gym.UpdatedAt)
 		if err == nil && gymTime.After(clientLastSync) {
 			response.Gyms = append(response.Gyms, gym)
@@ -577,6 +596,9 @@ func (s *SyncServer) handleDeltaSync(w http.ResponseWriter, r *http.Request) {
 
 	// Filter problems modified after client's last sync
 	for _, problem := range serverBackup.Problems {
+		if deletedItemMap["problem:"+problem.ID] {
+			continue
+		}
 		problemTime, err := time.Parse(time.RFC3339, problem.UpdatedAt)
 		if err == nil && problemTime.After(clientLastSync) {
 			response.Problems = append(response.Problems, problem)
@@ -585,6 +607,9 @@ func (s *SyncServer) handleDeltaSync(w http.ResponseWriter, r *http.Request) {
 
 	// Filter sessions modified after client's last sync
 	for _, session := range serverBackup.Sessions {
+		if deletedItemMap["session:"+session.ID] {
+			continue
+		}
 		sessionTime, err := time.Parse(time.RFC3339, session.UpdatedAt)
 		if err == nil && sessionTime.After(clientLastSync) {
 			response.Sessions = append(response.Sessions, session)
@@ -593,6 +618,9 @@ func (s *SyncServer) handleDeltaSync(w http.ResponseWriter, r *http.Request) {
 
 	// Filter attempts created after client's last sync
 	for _, attempt := range serverBackup.Attempts {
+		if deletedItemMap["attempt:"+attempt.ID] {
+			continue
+		}
 		attemptTime, err := time.Parse(time.RFC3339, attempt.CreatedAt)
 		if err == nil && attemptTime.After(clientLastSync) {
 			response.Attempts = append(response.Attempts, attempt)

sync/sync_test.go

@@ -0,0 +1,501 @@
+package main
+
+import (
+	"path/filepath"
+	"testing"
+	"time"
+)
+
+// TestDeltaSyncDeletedItemResurrection verifies deleted items don't resurrect
+func TestDeltaSyncDeletedItemResurrection(t *testing.T) {
+	tempDir := t.TempDir()
+	server := &SyncServer{
+		dataFile:  filepath.Join(tempDir, "test.json"),
+		imagesDir: filepath.Join(tempDir, "images"),
+		authToken: "test-token",
+	}
+
+	// Initial state: Server has one gym, one problem, one session with 8 attempts
+	now := time.Now().UTC()
+	gymID := "gym-1"
+	problemID := "problem-1"
+	sessionID := "session-1"
+
+	initialBackup := &ClimbDataBackup{
+		Version:       "2.0",
+		FormatVersion: "2.0",
+		Gyms: []BackupGym{
+			{
+				ID:                  gymID,
+				Name:                "Test Gym",
+				SupportedClimbTypes: []string{"BOULDER"},
+				DifficultySystems:   []string{"V"},
+				CreatedAt:           now.Add(-1 * time.Hour).Format(time.RFC3339),
+				UpdatedAt:           now.Add(-1 * time.Hour).Format(time.RFC3339),
+			},
+		},
+		Problems: []BackupProblem{
+			{
+				ID:        problemID,
+				GymID:     gymID,
+				ClimbType: "BOULDER",
+				Difficulty: DifficultyGrade{
+					System:       "V",
+					Grade:        "V5",
+					NumericValue: 5,
+				},
+				IsActive:  true,
+				CreatedAt: now.Add(-1 * time.Hour).Format(time.RFC3339),
+				UpdatedAt: now.Add(-1 * time.Hour).Format(time.RFC3339),
+			},
+		},
+		Sessions: []BackupClimbSession{
+			{
+				ID:        sessionID,
+				GymID:     gymID,
+				Date:      now.Format("2006-01-02"),
+				Status:    "completed",
+				CreatedAt: now.Add(-30 * time.Minute).Format(time.RFC3339),
+				UpdatedAt: now.Add(-30 * time.Minute).Format(time.RFC3339),
+			},
+		},
+		Attempts:     []BackupAttempt{},
+		DeletedItems: []DeletedItem{},
+	}
+
+	// Add 8 attempts
+	for i := 0; i < 8; i++ {
+		attempt := BackupAttempt{
+			ID:        "attempt-" + string(rune('1'+i)),
+			SessionID: sessionID,
+			ProblemID: problemID,
+			Result:    "COMPLETED",
+			Timestamp: now.Add(time.Duration(-25+i) * time.Minute).Format(time.RFC3339),
+			CreatedAt: now.Add(time.Duration(-25+i) * time.Minute).Format(time.RFC3339),
+		}
+		initialBackup.Attempts = append(initialBackup.Attempts, attempt)
+	}
+
+	if err := server.saveData(initialBackup); err != nil {
+		t.Fatalf("Failed to save initial data: %v", err)
+	}
+
+	// Client 1 syncs - gets all data
+	client1LastSync := now.Add(-2 * time.Hour).Format(time.RFC3339)
+	deltaRequest1 := DeltaSyncRequest{
+		LastSyncTime: client1LastSync,
+		Gyms:         []BackupGym{},
+		Problems:     []BackupProblem{},
+		Sessions:     []BackupClimbSession{},
+		Attempts:     []BackupAttempt{},
+		DeletedItems: []DeletedItem{},
+	}
+
+	// Simulate delta sync for client 1
+	serverBackup, _ := server.loadData()
+	serverBackup.DeletedItems = server.mergeDeletedItems(serverBackup.DeletedItems, deltaRequest1.DeletedItems)
+	server.applyDeletions(serverBackup, serverBackup.DeletedItems)
+
+	if len(serverBackup.Sessions) != 1 {
+		t.Errorf("Expected 1 session after client1 sync, got %d", len(serverBackup.Sessions))
+	}
+	if len(serverBackup.Attempts) != 8 {
+		t.Errorf("Expected 8 attempts after client1 sync, got %d", len(serverBackup.Attempts))
+	}
+
+	// Client 1 deletes the session locally
+	deleteTime := now.Format(time.RFC3339)
+	deletions := []DeletedItem{
+		{ID: sessionID, Type: "session", DeletedAt: deleteTime},
+	}
+	// Also track attempt deletions
+	for _, attempt := range initialBackup.Attempts {
+		deletions = append(deletions, DeletedItem{
+			ID:        attempt.ID,
+			Type:      "attempt",
+			DeletedAt: deleteTime,
+		})
+	}
+
+	// Client 1 syncs deletion
+	deltaRequest2 := DeltaSyncRequest{
+		LastSyncTime: now.Add(-5 * time.Minute).Format(time.RFC3339),
+		Gyms:         []BackupGym{},
+		Problems:     []BackupProblem{},
+		Sessions:     []BackupClimbSession{},
+		Attempts:     []BackupAttempt{},
+		DeletedItems: deletions,
+	}
+
+	// Server processes deletion
+	serverBackup, _ = server.loadData()
+	serverBackup.DeletedItems = server.mergeDeletedItems(serverBackup.DeletedItems, deltaRequest2.DeletedItems)
+	server.applyDeletions(serverBackup, serverBackup.DeletedItems)
+	server.saveData(serverBackup)
+
+	// Verify deletions were applied on server
+	serverBackup, _ = server.loadData()
+	if len(serverBackup.Sessions) != 0 {
+		t.Errorf("Expected 0 sessions after deletion, got %d", len(serverBackup.Sessions))
+	}
+	if len(serverBackup.Attempts) != 0 {
+		t.Errorf("Expected 0 attempts after deletion, got %d", len(serverBackup.Attempts))
+	}
+	if len(serverBackup.DeletedItems) != 9 {
+		t.Errorf("Expected 9 deletion records, got %d", len(serverBackup.DeletedItems))
+	}
+
+	// Client does local reset and pulls from server
+	deltaRequest3 := DeltaSyncRequest{
+		LastSyncTime: time.Time{}.Format(time.RFC3339),
+		Gyms:         []BackupGym{},
+		Problems:     []BackupProblem{},
+		Sessions:     []BackupClimbSession{},
+		Attempts:     []BackupAttempt{},
+		DeletedItems: []DeletedItem{},
+	}
+
+	serverBackup, _ = server.loadData()
+	clientLastSync, _ := time.Parse(time.RFC3339, deltaRequest3.LastSyncTime)
+
+	// Build response
+	response := DeltaSyncResponse{
+		ServerTime:   time.Now().UTC().Format(time.RFC3339),
+		Gyms:         []BackupGym{},
+		Problems:     []BackupProblem{},
+		Sessions:     []BackupClimbSession{},
+		Attempts:     []BackupAttempt{},
+		DeletedItems: []DeletedItem{},
+	}
+
+	// Build deleted item map
+	deletedItemMap := make(map[string]bool)
+	for _, item := range serverBackup.DeletedItems {
+		key := item.Type + ":" + item.ID
+		deletedItemMap[key] = true
+	}
+
+	// Filter sessions (excluding deleted)
+	for _, session := range serverBackup.Sessions {
+		if deletedItemMap["session:"+session.ID] {
+			continue
+		}
+		sessionTime, _ := time.Parse(time.RFC3339, session.UpdatedAt)
+		if sessionTime.After(clientLastSync) {
+			response.Sessions = append(response.Sessions, session)
+		}
+	}
+
+	// Filter attempts (excluding deleted)
+	for _, attempt := range serverBackup.Attempts {
+		if deletedItemMap["attempt:"+attempt.ID] {
+			continue
+		}
+		attemptTime, _ := time.Parse(time.RFC3339, attempt.CreatedAt)
+		if attemptTime.After(clientLastSync) {
+			response.Attempts = append(response.Attempts, attempt)
+		}
+	}
+
+	// Send deletion records
+	for _, deletion := range serverBackup.DeletedItems {
+		deletionTime, _ := time.Parse(time.RFC3339, deletion.DeletedAt)
+		if deletionTime.After(clientLastSync) {
+			response.DeletedItems = append(response.DeletedItems, deletion)
+		}
+	}
+
+	if len(response.Sessions) != 0 {
+		t.Errorf("Deleted session was resurrected! Got %d sessions in response", len(response.Sessions))
+	}
+	if len(response.Attempts) != 0 {
+		t.Errorf("Deleted attempts were resurrected! Got %d attempts in response", len(response.Attempts))
+	}
+	if len(response.DeletedItems) < 9 {
+		t.Errorf("Expected at least 9 deletion records in response, got %d", len(response.DeletedItems))
+	}
+}
+
+// TestDeltaSyncAttemptCount verifies all attempts are preserved
+func TestDeltaSyncAttemptCount(t *testing.T) {
+	tempDir := t.TempDir()
+	server := &SyncServer{
+		dataFile:  filepath.Join(tempDir, "test.json"),
+		imagesDir: filepath.Join(tempDir, "images"),
+		authToken: "test-token",
+	}
+
+	now := time.Now().UTC()
+	gymID := "gym-1"
+	problemID := "problem-1"
+	sessionID := "session-1"
+
+	// Create session with 8 attempts
+	initialBackup := &ClimbDataBackup{
+		Version:       "2.0",
+		FormatVersion: "2.0",
+		Gyms:          []BackupGym{{ID: gymID, Name: "Test Gym", SupportedClimbTypes: []string{"BOULDER"}, DifficultySystems: []string{"V"}, CreatedAt: now.Format(time.RFC3339), UpdatedAt: now.Format(time.RFC3339)}},
+		Problems:      []BackupProblem{{ID: problemID, GymID: gymID, ClimbType: "BOULDER", Difficulty: DifficultyGrade{System: "V", Grade: "V5", NumericValue: 5}, IsActive: true, CreatedAt: now.Format(time.RFC3339), UpdatedAt: now.Format(time.RFC3339)}},
+		Sessions:      []BackupClimbSession{{ID: sessionID, GymID: gymID, Date: now.Format("2006-01-02"), Status: "completed", CreatedAt: now.Format(time.RFC3339), UpdatedAt: now.Format(time.RFC3339)}},
+		Attempts:      []BackupAttempt{},
+		DeletedItems:  []DeletedItem{},
+	}
+
+	// Add 8 attempts at different times
+	baseTime := now.Add(-30 * time.Minute)
+	for i := 0; i < 8; i++ {
+		attempt := BackupAttempt{
+			ID:        "attempt-" + string(rune('1'+i)),
+			SessionID: sessionID,
+			ProblemID: problemID,
+			Result:    "COMPLETED",
+			Timestamp: baseTime.Add(time.Duration(i) * time.Minute).Format(time.RFC3339),
+			CreatedAt: baseTime.Add(time.Duration(i) * time.Minute).Format(time.RFC3339),
+		}
+		initialBackup.Attempts = append(initialBackup.Attempts, attempt)
+	}
+
+	if err := server.saveData(initialBackup); err != nil {
+		t.Fatalf("Failed to save initial data: %v", err)
+	}
+
+	// Client syncs with lastSyncTime BEFORE all attempts were created
+	clientLastSync := baseTime.Add(-1 * time.Hour)
+
+	serverBackup, _ := server.loadData()
+
+	// Count attempts that should be returned
+	attemptCount := 0
+	for _, attempt := range serverBackup.Attempts {
+		attemptTime, _ := time.Parse(time.RFC3339, attempt.CreatedAt)
+		if attemptTime.After(clientLastSync) {
+			attemptCount++
+		}
+	}
+
+	if attemptCount != 8 {
+		t.Errorf("Expected all 8 attempts to be returned, got %d", attemptCount)
+	}
+
+}
+
+// TestTombstoneCleanup verifies old deletion records are cleaned up
+func TestTombstoneCleanup(t *testing.T) {
+	server := &SyncServer{}
+
+	now := time.Now().UTC()
+	oldDeletion := DeletedItem{
+		ID:        "old-item",
+		Type:      "session",
+		DeletedAt: now.Add(-31 * 24 * time.Hour).Format(time.RFC3339), // 31 days old
+	}
+	recentDeletion := DeletedItem{
+		ID:        "recent-item",
+		Type:      "session",
+		DeletedAt: now.Add(-1 * 24 * time.Hour).Format(time.RFC3339), // 1 day old
+	}
+
+	existing := []DeletedItem{oldDeletion}
+	updates := []DeletedItem{recentDeletion}
+
+	merged := server.mergeDeletedItems(existing, updates)
+
+	// Old deletion should be cleaned up, only recent one remains
+	if len(merged) != 1 {
+		t.Errorf("Expected 1 deletion record after cleanup, got %d", len(merged))
+	}
+	if len(merged) > 0 && merged[0].ID != "recent-item" {
+		t.Errorf("Expected recent deletion to remain, got %s", merged[0].ID)
+	}
+
+}
+
+// TestMergeDeletedItemsDeduplication verifies duplicate deletions are handled
+func TestMergeDeletedItemsDeduplication(t *testing.T) {
+	server := &SyncServer{}
+
+	now := time.Now().UTC()
+	deletion1 := DeletedItem{
+		ID:        "item-1",
+		Type:      "session",
+		DeletedAt: now.Add(-1 * time.Hour).Format(time.RFC3339),
+	}
+	deletion2 := DeletedItem{
+		ID:        "item-1",
+		Type:      "session",
+		DeletedAt: now.Format(time.RFC3339), // Newer timestamp
+	}
+
+	existing := []DeletedItem{deletion1}
+	updates := []DeletedItem{deletion2}
+
+	merged := server.mergeDeletedItems(existing, updates)
+
+	if len(merged) != 1 {
+		t.Errorf("Expected 1 deletion record, got %d", len(merged))
+	}
+	if len(merged) > 0 && merged[0].DeletedAt != deletion2.DeletedAt {
+		t.Errorf("Expected newer deletion timestamp to be kept")
+	}
+
+}
+
+// TestApplyDeletions verifies deletions are applied correctly
+func TestApplyDeletions(t *testing.T) {
+	server := &SyncServer{}
+
+	now := time.Now().UTC()
+	backup := &ClimbDataBackup{
+		Version:       "2.0",
+		FormatVersion: "2.0",
+		Gyms:          []BackupGym{{ID: "gym-1", Name: "Test Gym", SupportedClimbTypes: []string{}, DifficultySystems: []string{}, CreatedAt: now.Format(time.RFC3339), UpdatedAt: now.Format(time.RFC3339)}},
+		Problems:      []BackupProblem{{ID: "problem-1", GymID: "gym-1", ClimbType: "BOULDER", Difficulty: DifficultyGrade{System: "V", Grade: "V5", NumericValue: 5}, IsActive: true, CreatedAt: now.Format(time.RFC3339), UpdatedAt: now.Format(time.RFC3339)}},
+		Sessions:      []BackupClimbSession{{ID: "session-1", GymID: "gym-1", Date: now.Format("2006-01-02"), Status: "completed", CreatedAt: now.Format(time.RFC3339), UpdatedAt: now.Format(time.RFC3339)}},
+		Attempts:      []BackupAttempt{{ID: "attempt-1", SessionID: "session-1", ProblemID: "problem-1", Result: "COMPLETED", Timestamp: now.Format(time.RFC3339), CreatedAt: now.Format(time.RFC3339)}},
+		DeletedItems:  []DeletedItem{},
+	}
+
+	deletions := []DeletedItem{
+		{ID: "session-1", Type: "session", DeletedAt: now.Format(time.RFC3339)},
+		{ID: "attempt-1", Type: "attempt", DeletedAt: now.Format(time.RFC3339)},
+	}
+
+	server.applyDeletions(backup, deletions)
+
+	if len(backup.Sessions) != 0 {
+		t.Errorf("Expected 0 sessions after deletion, got %d", len(backup.Sessions))
+	}
+	if len(backup.Attempts) != 0 {
+		t.Errorf("Expected 0 attempts after deletion, got %d", len(backup.Attempts))
+	}
+	if len(backup.Gyms) != 1 {
+		t.Errorf("Expected gym to remain, got %d gyms", len(backup.Gyms))
+	}
+	if len(backup.Problems) != 1 {
+		t.Errorf("Expected problem to remain, got %d problems", len(backup.Problems))
+	}
+
+}
+
+// TestCascadingDeletions verifies related items are handled properly
+func TestCascadingDeletions(t *testing.T) {
+	server := &SyncServer{}
+
+	now := time.Now().UTC()
+	sessionID := "session-1"
+	backup := &ClimbDataBackup{
+		Version:       "2.0",
+		FormatVersion: "2.0",
+		Gyms:          []BackupGym{{ID: "gym-1", Name: "Test Gym", SupportedClimbTypes: []string{}, DifficultySystems: []string{}, CreatedAt: now.Format(time.RFC3339), UpdatedAt: now.Format(time.RFC3339)}},
+		Problems:      []BackupProblem{{ID: "problem-1", GymID: "gym-1", ClimbType: "BOULDER", Difficulty: DifficultyGrade{System: "V", Grade: "V5", NumericValue: 5}, IsActive: true, CreatedAt: now.Format(time.RFC3339), UpdatedAt: now.Format(time.RFC3339)}},
+		Sessions:      []BackupClimbSession{{ID: sessionID, GymID: "gym-1", Date: now.Format("2006-01-02"), Status: "completed", CreatedAt: now.Format(time.RFC3339), UpdatedAt: now.Format(time.RFC3339)}},
+		Attempts:      []BackupAttempt{},
+		DeletedItems:  []DeletedItem{},
+	}
+
+	// Add multiple attempts for the session
+	for i := 0; i < 5; i++ {
+		backup.Attempts = append(backup.Attempts, BackupAttempt{
+			ID:        "attempt-" + string(rune('1'+i)),
+			SessionID: sessionID,
+			ProblemID: "problem-1",
+			Result:    "COMPLETED",
+			Timestamp: now.Format(time.RFC3339),
+			CreatedAt: now.Format(time.RFC3339),
+		})
+	}
+
+	// Delete session - attempts should also be tracked as deleted
+	deletions := []DeletedItem{
+		{ID: sessionID, Type: "session", DeletedAt: now.Format(time.RFC3339)},
+	}
+	for _, attempt := range backup.Attempts {
+		deletions = append(deletions, DeletedItem{
+			ID:        attempt.ID,
+			Type:      "attempt",
+			DeletedAt: now.Format(time.RFC3339),
+		})
+	}
+
+	server.applyDeletions(backup, deletions)
+
+	if len(backup.Sessions) != 0 {
+		t.Errorf("Expected session to be deleted, got %d sessions", len(backup.Sessions))
+	}
+	if len(backup.Attempts) != 0 {
+		t.Errorf("Expected all attempts to be deleted, got %d attempts", len(backup.Attempts))
+	}
+
+}
+
+// TestFullSyncAfterReset verifies the reported user scenario
+func TestFullSyncAfterReset(t *testing.T) {
+	tempDir := t.TempDir()
+	server := &SyncServer{
+		dataFile:  filepath.Join(tempDir, "test.json"),
+		imagesDir: filepath.Join(tempDir, "images"),
+		authToken: "test-token",
+	}
+
+	now := time.Now().UTC()
+
+	// Initial sync with data
+	initialData := &ClimbDataBackup{
+		Version:       "2.0",
+		FormatVersion: "2.0",
+		Gyms:          []BackupGym{{ID: "gym-1", Name: "Test Gym", SupportedClimbTypes: []string{"BOULDER"}, DifficultySystems: []string{"V"}, CreatedAt: now.Format(time.RFC3339), UpdatedAt: now.Format(time.RFC3339)}},
+		Problems:      []BackupProblem{{ID: "problem-1", GymID: "gym-1", ClimbType: "BOULDER", Difficulty: DifficultyGrade{System: "V", Grade: "V5", NumericValue: 5}, IsActive: true, CreatedAt: now.Format(time.RFC3339), UpdatedAt: now.Format(time.RFC3339)}},
+		Sessions:      []BackupClimbSession{{ID: "session-1", GymID: "gym-1", Date: now.Format("2006-01-02"), Status: "completed", CreatedAt: now.Format(time.RFC3339), UpdatedAt: now.Format(time.RFC3339)}},
+		Attempts:      []BackupAttempt{},
+		DeletedItems:  []DeletedItem{},
+	}
+	for i := 0; i < 8; i++ {
+		initialData.Attempts = append(initialData.Attempts, BackupAttempt{
+			ID:        "attempt-" + string(rune('1'+i)),
+			SessionID: "session-1",
+			ProblemID: "problem-1",
+			Result:    "COMPLETED",
+			Timestamp: now.Add(time.Duration(i) * time.Minute).Format(time.RFC3339),
+			CreatedAt: now.Add(time.Duration(i) * time.Minute).Format(time.RFC3339),
+		})
+	}
+	server.saveData(initialData)
+
+	// Client deletes everything and syncs
+	deletions := []DeletedItem{
+		{ID: "gym-1", Type: "gym", DeletedAt: now.Add(10 * time.Minute).Format(time.RFC3339)},
+		{ID: "problem-1", Type: "problem", DeletedAt: now.Add(10 * time.Minute).Format(time.RFC3339)},
+		{ID: "session-1", Type: "session", DeletedAt: now.Add(10 * time.Minute).Format(time.RFC3339)},
+	}
+	for i := 0; i < 8; i++ {
+		deletions = append(deletions, DeletedItem{
+			ID:        "attempt-" + string(rune('1'+i)),
+			Type:      "attempt",
+			DeletedAt: now.Add(10 * time.Minute).Format(time.RFC3339),
+		})
+	}
+
+	serverBackup, _ := server.loadData()
+	serverBackup.DeletedItems = server.mergeDeletedItems(serverBackup.DeletedItems, deletions)
+	server.applyDeletions(serverBackup, serverBackup.DeletedItems)
+	server.saveData(serverBackup)
+
+	// Client does local reset and pulls from server
+	serverBackup, _ = server.loadData()
+
+	if len(serverBackup.Gyms) != 0 {
+		t.Errorf("Expected 0 gyms, got %d", len(serverBackup.Gyms))
+	}
+	if len(serverBackup.Problems) != 0 {
+		t.Errorf("Expected 0 problems, got %d", len(serverBackup.Problems))
+	}
+	if len(serverBackup.Sessions) != 0 {
+		t.Errorf("Expected 0 sessions, got %d", len(serverBackup.Sessions))
+	}
+	if len(serverBackup.Attempts) != 0 {
+		t.Errorf("Expected 0 attempts, got %d", len(serverBackup.Attempts))
+	}
+	if len(serverBackup.DeletedItems) == 0 {
+		t.Errorf("Expected deletion records, got 0")
+	}
+}