Apply dart auto fixes

lib/app.dart

@@ -21,7 +21,7 @@ import 'view/pages/talk/chatList.dart';
 import 'view/pages/timetable/timetable.dart';
 
 class App extends StatefulWidget {
-  const App({Key? key}) : super(key: key);
+  const App({super.key});
 
   static PersistentTabController bottomNavigator = PersistentTabController(initialIndex: 0);