docs: 更新 README，写明 Flutter 3.29.3 版本要求及快速开始指引

README.md

-# flutter_book
+# 清控紫荆数智学堂
 
-A new Flutter project.
+## 环境要求
 
-## Getting Started
+| 工具 | 版本 |
+|------|------|
+| Flutter SDK | **3.29.3** |
+| Dart | >=3.0.0 <4.0.0 |
+| Android Studio | Ladybug 及以上 |
+| Xcode | 16+ |
+| CocoaPods | >=1.16 |
 
-This project is a starting point for a Flutter application.
+## 依赖说明
 
-A few resources to get you started if this is your first Flutter project:
+项目保留了 Kotlin 1.8.22 以确保 fluwx（微信支付）和 tobias（支付宝）兼容性，不可升级至 Kotlin 2.x。
 
-- [Lab: Write your first Flutter app](https://docs.flutter.dev/get-started/codelab)
-- [Cookbook: Useful Flutter samples](https://docs.flutter.dev/cookbook)
+## 快速开始
 
-For help getting started with Flutter development, view the
-[online documentation](https://docs.flutter.dev/), which offers tutorials,
-samples, guidance on mobile development, and a full API reference.
+```bash
+# 安装依赖
+flutter pub get
+
+# 运行 iOS
+cd ios && pod install && cd ..
+flutter run -d ios
+
+# 运行 Android
+flutter run -d android
+```
+
+## 构建
+
+```bash
+# Android
+flutter build apk --release
+
+# iOS
+flutter build ios --release --no-codesign
+```