提交 Nontonki 短剧原型，准备推送到远程仓库。

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/main.dart

@@ -0,0 +1,9 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+import 'app.dart';
+
+Future<void> main() async {
+  WidgetsFlutterBinding.ensureInitialized();
+  await SystemChrome.setPreferredOrientations([DeviceOrientation.portraitUp]);
+  runApp(const LumaDramaApp());
+}