migrated custom timetable events to Marianum-Connect and refactored push notification handling

lib/main.dart

@@ -22,6 +22,7 @@ import 'api/marianumconnect/auth/session_validator.dart';
 import 'api/marianumconnect/marianumconnect_endpoint.dart';
 import 'api/marianumconnect/queries/get_breakers/get_breakers_response.dart';
 import 'api/marianumconnect/queries/report_client_error/client_error_reporter.dart';
+import 'api/marianumconnect/queries/telemetry_heartbeat/telemetry_heartbeat.dart';
 import 'app.dart';
 import 'background/widget_background_task.dart';
 import 'firebase_options.dart';
@@ -29,6 +30,7 @@ import 'model/account_data.dart';
 import 'notification/notification_service.dart';
 import 'push/push_message_handler.dart';
 import 'push/push_registration.dart';
+import 'push/push_registration_store.dart';
 import 'push/push_renderer.dart';
 import 'routing/app_routes.dart';
 import 'share_intent/share_intent_listener.dart';
@@ -251,14 +253,23 @@ class _MainState extends State<Main> {
     unawaited(ListFilesCache.prefetchRootListing());
   }
 
-  /// Registers/self-heals the push subscription when push is user-enabled and
-  /// the backend advertises the capability. Fire-and-forget.
+  /// Registers/self-heals the push subscription whenever the backend advertises
+  /// the capability — independent of the notification toggle, so a user with
+  /// notifications off stays registered for silent sync pushes. Fire-and-forget.
   void _syncPush(SettingsCubit settings, CapabilitiesCubit capabilities) {
+    final enabled = settings.val().notificationSettings.enabled;
     unawaited(
       PushRegistration.syncSubscription(
-        enabled: settings.val().notificationSettings.enabled,
         capable: capabilities.canReceivePushNotifications,
-      ),
+      ).then((registered) {
+        // The app-start heartbeat runs before this async registration
+        // finishes, so it reports the pre-registration state. Re-emit once
+        // the identifier is persisted so the new push status shows up this
+        // session instead of only after the next launch.
+        if (registered) {
+          TelemetryHeartbeat.report(notificationsEnabled: enabled);
+        }
+      }),
     );
   }
 
@@ -290,6 +301,13 @@ class _MainState extends State<Main> {
         final mcBaseUrl = devToolsSettings.resolveMarianumConnectBaseUrl();
         MarianumConnectEndpoint.update(mcBaseUrl);
         unawaited(WidgetSync.setMarianumConnectBaseUrl(mcBaseUrl));
+        // Mirror the notification toggle into group-scoped storage so the FCM
+        // background isolate and the iOS NSE can suppress rendering when off.
+        unawaited(
+          const PushRegistrationStore().setNotificationsEnabled(
+            settings.notificationSettings.enabled,
+          ),
+        );
         return MaterialApp(
           showPerformanceOverlay: devToolsSettings.showPerformanceOverlay,
           checkerboardOffscreenLayers: