added guardian letters with chat and multiple answer functionalities

lib/app.dart

@@ -11,6 +11,7 @@ import 'api/marianumconnect/queries/telemetry_heartbeat/telemetry_heartbeat.dart
 import 'main.dart';
 import 'model/data_cleaner.dart';
 import 'notification/notification_controller.dart';
+import 'notification/notification_service.dart';
 import 'notification/notification_tasks.dart';
 import 'push/push_registration.dart';
 import 'push/push_tap_router.dart';
@@ -119,18 +120,11 @@ class _AppState extends State<App> with WidgetsBindingObserver {
     }
   }
 
-  void _onPushTapPending() {
-    final token = PushTapRouter.pendingChatToken.value;
-    if (token == null || !mounted) return;
-    PushTapRouter.pendingChatToken.value = null;
-    NotificationTasks.navigateToTalk(context, chatToken: token);
-  }
-
-  void _onNewsletterTapPending() {
-    final id = PushTapRouter.pendingNewsletterId.value;
-    if (id == null || !mounted) return;
-    PushTapRouter.pendingNewsletterId.value = null;
-    AppRoutes.openNewsletterById(context, id: id);
+  void _onPushTargetPending() {
+    final target = PushTapRouter.pendingTarget.value;
+    if (target == null || !mounted) return;
+    PushTapRouter.pendingTarget.value = null;
+    NotificationTasks.openPushTarget(context, target);
   }
 
   Future<void> _handlePendingWidgetNavigation() async {
@@ -234,8 +228,12 @@ class _AppState extends State<App> with WidgetsBindingObserver {
 
     // Android renders pushes locally, so a tap arrives via the local
     // notifications callback (PushTapRouter) rather than onMessageOpenedApp.
-    PushTapRouter.pendingChatToken.addListener(_onPushTapPending);
-    PushTapRouter.pendingNewsletterId.addListener(_onNewsletterTapPending);
+    PushTapRouter.pendingTarget.addListener(_onPushTargetPending);
+    unawaited(
+      PushTapRouter.handleAppLaunch(
+        NotificationService().flutterLocalNotificationsPlugin,
+      ),
+    );
 
     _onMessageSub = FirebaseMessaging.onMessage.listen((message) {
       if (!mounted) return;
@@ -264,8 +262,7 @@ class _AppState extends State<App> with WidgetsBindingObserver {
     _onMessageSub?.cancel();
     _onMessageOpenedAppSub?.cancel();
     _fcmTokenRefreshSub?.cancel();
-    PushTapRouter.pendingChatToken.removeListener(_onPushTapPending);
-    PushTapRouter.pendingNewsletterId.removeListener(_onNewsletterTapPending);
+    PushTapRouter.pendingTarget.removeListener(_onPushTargetPending);
     ShareIntentListener.pending.removeListener(_handlePendingShare);
     ShareIntentListener.instance.detach();
     Main.bottomNavigator.removeListener(_onTabControllerChanged);