main.dart import 'package:flutter/material.dart'; import 'src/app.dart'; void main() => runApp(App());src/app.dart import 'package:flutter/material.dart'; import 'screens/login_screen.dart'; class App extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( title: 'Login', home: Scaffold( appBar: AppBar( title: Text('..