implemented an E2E-encrypted Nextcloud push-v2 notification system with support for RSA decryption and signature verification; introduced an iOS Notification Service Extension and native AppDelegate handlers for Talk actions (inline reply and mark-as-read); replaced the legacy notification registration with a new lifecycle managing app passwords and secure keypair storage; added background message handling with tray synchronization and a test notification utility in the settings.

lib/notification/notification_tasks.dart

@@ -1,7 +1,6 @@
 import 'dart:developer';
 
 import 'package:eraser/eraser.dart';
-import 'package:firebase_messaging/firebase_messaging.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_app_badge/flutter_app_badge.dart';
@@ -12,10 +11,18 @@ import '../state/app/modules/chat_list/bloc/chat_list_bloc.dart';
 import 'notification_service.dart';
 
 class NotificationTasks {
-  static void updateBadgeCount(RemoteMessage notification) {
-    FlutterAppBadge.count(
-      int.parse((notification.data['unreadCount'] as String?) ?? '0'),
-    );
+  /// Recomputes the app badge from the notifications currently in the tray.
+  /// Deterministic — no server-provided counter to drift out of sync — so the
+  /// badge always matches what the user actually sees. Called after rendering,
+  /// cancelling, or opening the app.
+  static Future<void> refreshBadge() async {
+    try {
+      final plugin = NotificationService().flutterLocalNotificationsPlugin;
+      final actives = await plugin.getActiveNotifications();
+      await FlutterAppBadge.count(actives.length);
+    } on Object catch (e) {
+      log('Badge refresh failed: $e');
+    }
   }
 
   /// Per-chat tag scheme. MUST match the Notify backend, which sets this