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/push/push_tap_router.dart

@@ -0,0 +1,40 @@
+import 'dart:convert';
+
+import 'package:flutter/foundation.dart';
+import 'package:flutter_local_notifications/flutter_local_notifications.dart';
+
+import 'push_actions.dart';
+
+/// Routes foreground notification interactions from the single
+/// flutter_local_notifications response callback. Action responses (reply /
+/// mark-read) are dispatched straight to [PushActions]; a plain tap publishes
+/// the target chat token via [pendingChatToken] for [App] to navigate to.
+class PushTapRouter {
+  PushTapRouter._();
+
+  /// Chat token of the most recently tapped Talk notification, or null. [App]
+  /// listens to this and opens the chat, then resets it to null.
+  static final ValueNotifier<String?> pendingChatToken = ValueNotifier(null);
+
+  static void handleResponse(NotificationResponse response) {
+    final actionId = response.actionId;
+    if (actionId == kTalkReplyActionId || actionId == kTalkMarkReadActionId) {
+      // Reuse the isolate-safe action dispatch for foreground actions too.
+      PushActions.handleBackgroundResponse(response);
+      return;
+    }
+    final token = _chatTokenFrom(response.payload);
+    if (token != null) pendingChatToken.value = token;
+  }
+
+  static String? _chatTokenFrom(String? payload) {
+    if (payload == null || payload.isEmpty) return null;
+    try {
+      final map = jsonDecode(payload) as Map<String, dynamic>;
+      final token = map['chatToken'];
+      return token is String && token.isNotEmpty ? token : null;
+    } on Object {
+      return null;
+    }
+  }
+}