FlutterFlow导出源码后的修复

1.检查环境：flutter doctor
2.下载和安装项目依赖的库：flutter pub get
3.更新依赖包到兼容版本：flutter pub upgrade
4.升级 AGP & Gradle（AI）
5.打包：flutter build apk –release

清理缓存：flutter clean
默认启动：flutter run