implemented scheduled updates for widgets

lib/app.dart

@@ -24,6 +24,7 @@ import 'storage/base/settingsProvider.dart';
 import 'view/pages/overhang.dart';
 
 class App extends StatefulWidget {
+  static GlobalKey appContext = GlobalKey();
   const App({super.key});
 
   @override
@@ -31,7 +32,6 @@ class App extends StatefulWidget {
 }
 
 class _AppState extends State<App> with WidgetsBindingObserver {
-
   late Timer refetchChats;
   late Timer updateTimings;