folder restructuring

lib/app.dart

@@ -11,10 +11,10 @@ import 'api/mhsl/breaker/getBreakers/getBreakersResponse.dart';
 import 'api/mhsl/server/userIndex/update/updateUserindex.dart';
 import 'main.dart';
 import 'widget/breaker/breaker.dart';
-import 'model/dataCleaner.dart';
-import 'notification/notificationController.dart';
-import 'notification/notificationTasks.dart';
-import 'notification/notifyUpdater.dart';
+import 'model/data_cleaner.dart';
+import 'notification/notification_controller.dart';
+import 'notification/notification_tasks.dart';
+import 'notification/notify_updater.dart';
 import 'state/app/modules/app_modules.dart';
 import 'state/app/modules/breaker/bloc/breaker_bloc.dart';
 import 'state/app/modules/chatList/bloc/chat_list_bloc.dart';
@@ -106,7 +106,7 @@ class _AppState extends State<App> with WidgetsBindingObserver {
         controller: Main.bottomNavigator,
         navBarOverlap: const NavBarOverlap.none(),
         backgroundColor: Theme.of(context).colorScheme.primary,
-        handleAndroidBackButtonPress: false,
+        handleAndroidBackButtonPress: true,
         screenTransitionAnimation: const ScreenTransitionAnimation(
           curve: Curves.easeOutQuad,
           duration: Duration(milliseconds: 200),