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_service.dart

@@ -1,5 +1,9 @@
 import 'package:flutter_local_notifications/flutter_local_notifications.dart';
 
+import '../push/push_actions.dart';
+import '../push/push_renderer.dart';
+import '../push/push_tap_router.dart';
+
 class NotificationService {
   static final NotificationService _instance = NotificationService._internal();
 
@@ -15,7 +19,27 @@ class NotificationService {
       '@mipmap/ic_launcher',
     );
 
-    final iosSettings = DarwinInitializationSettings();
+    // iOS Talk category mirrors the Android inline reply + mark-as-read actions
+    // so both platforms expose the same quick actions. The actual delivery of
+    // these while the app is terminated is handled by the (Phase 3) NSE.
+    final iosSettings = DarwinInitializationSettings(
+      notificationCategories: [
+        DarwinNotificationCategory(
+          PushRenderer.iosTalkCategory,
+          actions: [
+            DarwinNotificationAction.text(
+              kTalkReplyActionId,
+              'Antworten',
+              buttonTitle: 'Senden',
+              options: const {
+                DarwinNotificationActionOption.authenticationRequired,
+              },
+            ),
+            DarwinNotificationAction.plain(kTalkMarkReadActionId, 'Gelesen'),
+          ],
+        ),
+      ],
+    );
 
     final initializationSettings = InitializationSettings(
       android: androidSettings,
@@ -24,34 +48,9 @@ class NotificationService {
 
     await flutterLocalNotificationsPlugin.initialize(
       settings: initializationSettings,
-    );
-  }
-
-  Future<void> showNotification({
-    required String title,
-    required String body,
-    required int badgeCount,
-  }) async {
-    const androidPlatformChannelSpecifics = AndroidNotificationDetails(
-      'marmobile',
-      'Marianum Fulda',
-      importance: Importance.defaultImportance,
-      priority: Priority.defaultPriority,
-      ticker: 'Marianum Fulda',
-    );
-
-    const iosPlatformChannelSpecifics = DarwinNotificationDetails();
-
-    const platformChannelSpecifics = NotificationDetails(
-      android: androidPlatformChannelSpecifics,
-      iOS: iosPlatformChannelSpecifics,
-    );
-
-    await flutterLocalNotificationsPlugin.show(
-      id: 0,
-      title: title,
-      body: body,
-      notificationDetails: platformChannelSpecifics,
+      onDidReceiveNotificationResponse: PushTapRouter.handleResponse,
+      onDidReceiveBackgroundNotificationResponse:
+          PushActions.handleBackgroundResponse,
     );
   }
 }