improved performance and battery usage on older devices

lib/notification/notification_controller.dart

@@ -7,6 +7,8 @@ import 'package:flutter_bloc/flutter_bloc.dart';
 import '../push/push_message_handler.dart';
 import '../routing/app_routes.dart';
 import '../state/app/modules/chat/bloc/chat_bloc.dart';
+import '../state/app/modules/chat_list/bloc/chat_list_bloc.dart';
+import '../utils/debouncer.dart';
 import '../widget/debug/debug_tile.dart';
 import '../widget/debug/json_viewer.dart';
 import '../widget/info_dialog.dart';
@@ -35,7 +37,14 @@ class NotificationController {
     );
     await NotificationTasks.refreshBadge();
     if (!context.mounted) return;
-    NotificationTasks.updateProviders(context);
+    // A busy group chat delivers pushes in bursts; one silent refresh after
+    // the burst replaces a full room-list fetch per message.
+    final chatList = context.read<ChatListBloc>();
+    Debouncer.debounce(
+      'pushChatListRefresh',
+      const Duration(seconds: 1),
+      () => chatList.refresh(silent: true),
+    );
   }
 
   static Future<void> onAppOpenedByNotification(