Added discounts to invoices

src/pages/dashboard/invoices/[id]/edit.astro

@@ -38,6 +38,10 @@ if (!membership) {
 // Format dates for input[type="date"]
 const issueDateStr = invoice.issueDate.toISOString().split('T')[0];
 const dueDateStr = invoice.dueDate.toISOString().split('T')[0];
+
+const discountValueDisplay = invoice.discountType === 'fixed'
+  ? (invoice.discountValue || 0) / 100
+  : (invoice.discountValue || 0);
 ---
 
 <DashboardLayout title={`Edit ${invoice.number} - Chronus`}>
@@ -112,6 +116,27 @@ const dueDateStr = invoice.dueDate.toISOString().split('T')[0];
             />
           </div>
 
+          <!-- Discount -->
+          <div class="form-control">
+            <label class="label">
+              <span class="label-text font-semibold">Discount</span>
+            </label>
+            <div class="join w-full">
+              <select name="discountType" class="select select-bordered join-item">
+                <option value="percentage" selected={!invoice.discountType || invoice.discountType === 'percentage'}>%</option>
+                <option value="fixed" selected={invoice.discountType === 'fixed'}>Fixed</option>
+              </select>
+              <input
+                type="number"
+                name="discountValue"
+                step="0.01"
+                min="0"
+                class="input input-bordered join-item w-full"
+                value={discountValueDisplay}
+              />
+            </div>
+          </div>
+
            <!-- Tax Rate -->
           <div class="form-control">
             <label class="label">