Notifications (android via local) work

flutter/lib/settings/app_settings.dart

@@ -0,0 +1,33 @@
+import 'package:flutter/material.dart';
+
+class AppSettings extends ChangeNotifier {
+  bool groupNotifications = true;
+  int messagePageSize = 128;
+  bool showDebugButton = true;
+
+  static AppSettings? _singleton = AppSettings._internal();
+
+  factory AppSettings() {
+    return _singleton ?? (_singleton = AppSettings._internal());
+  }
+
+  AppSettings._internal() {
+    load();
+  }
+
+  void clear() {
+    //TODO
+
+    notifyListeners();
+  }
+
+  void load() {
+    //TODO
+
+    notifyListeners();
+  }
+
+  Future<void> save() async {
+    //TODO
+  }
+}