Added defineModel support for PreviewText and added missing Customize component in GlitchTextDemo.

src/components/common/PreviewText.vue

@@ -3,24 +3,18 @@
     <span class="text-label">{{ title }}</span>
 
     <input
-      :value="modelValue"
-      @input="handleChange"
+      v-model="model"
       class="w-[300px] px-3 py-2 bg-[#0b0b0b] border border-[#333] rounded-md text-white focus:outline-none focus:border-[#666]"
     />
   </div>
 </template>
 
 <script setup lang="ts">
-const emit = defineEmits(['update:modelValue']);
 defineProps<{
   title: string;
-  modelValue: string;
 }>();
 
-const handleChange = (event: Event) => {
-  const target = event.target as HTMLInputElement;
-  emit('update:modelValue', target.value);
-};
+const model = defineModel<string>();
 </script>
 
 <style scoped>