refactor: convert AmountInput to function props

- Convert AmountInput from @Emit("update:value") to onUpdateValue function prop
- Update GiftDetailsStep to use new function prop interface for amount handling

AmountInput now provides better parent control over validation and updates

src/views/ContactsView.vue

@@ -36,8 +36,8 @@
       :on-navigate-onboard-meeting="
         () => $router.push({ name: 'onboard-meeting-list' })
       "
-      @qr-scan="handleQRCodeClick"
       :on-update-model-value="(value: string) => (contactInput = value)"
+      @qr-scan="handleQRCodeClick"
     />
 
     <ContactListHeader
@@ -1242,12 +1242,14 @@ export default class ContactsView extends Vue {
    * Handle QR code button click - route to appropriate scanner
    * Uses native scanner on mobile platforms, web scanner otherwise
    */
-  
 
   public handleQRCodeClick() {
     console.log("[ContactsView] handleQRCodeClick method called");
-    this.$logAndConsole("[ContactsView] handleQRCodeClick method called", false);
-    
+    this.$logAndConsole(
+      "[ContactsView] handleQRCodeClick method called",
+      false,
+    );
+
     if (Capacitor.isNativePlatform()) {
       console.log("[ContactsView] Navigating to contact-qr-scan-full");
       this.$router.push({ name: "contact-qr-scan-full" });