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/api/marianumconnect/queries/get_capabilities/get_capabilities_response.dart

@@ -11,7 +11,15 @@ class CapabilitiesResponse {
   @JsonKey(defaultValue: false)
   final bool viewForeignTimetables;
 
-  CapabilitiesResponse({required this.viewForeignTimetables});
+  /// Whether the backend push-proxy feature is configured and enabled for this
+  /// user. The app only registers for push when this is true.
+  @JsonKey(defaultValue: false)
+  final bool pushNotifications;
+
+  CapabilitiesResponse({
+    required this.viewForeignTimetables,
+    required this.pushNotifications,
+  });
 
   factory CapabilitiesResponse.fromJson(Map<String, dynamic> json) =>
       _$CapabilitiesResponseFromJson(json);

lib/api/marianumconnect/queries/get_capabilities/get_capabilities_response.g.dart

@@ -10,8 +10,12 @@ CapabilitiesResponse _$CapabilitiesResponseFromJson(
   Map<String, dynamic> json,
 ) => CapabilitiesResponse(
   viewForeignTimetables: json['viewForeignTimetables'] as bool? ?? false,
+  pushNotifications: json['pushNotifications'] as bool? ?? false,
 );
 
 Map<String, dynamic> _$CapabilitiesResponseToJson(
   CapabilitiesResponse instance,
-) => <String, dynamic>{'viewForeignTimetables': instance.viewForeignTimetables};
+) => <String, dynamic>{
+  'viewForeignTimetables': instance.viewForeignTimetables,
+  'pushNotifications': instance.pushNotifications,
+};