fix bug

MACOS_BUILD_GUIDE.md

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+# macOS 编译测试指南
+
+## 快速开始
+
+```bash
+cd /Users/yuantiancai/work/FocusBuddy
+flutter pub get
+flutter run -d macos
+```
+
+## 环境要求
+
+### Flutter
+Flutter 已安装在 `/Users/yuantiancai/sdk/flutter`
+
+```bash
+# 添加到 PATH
+export PATH="$PATH:$HOME/sdk/flutter/bin"
+source ~/.zshrc
+```
+
+### Xcode
+从 Mac App Store 安装 Xcode，然后：
+```bash
+sudo xcodebuild -license accept
+```
+
+### CocoaPods
+使用 rbenv 安装 Ruby 3.x 和 CocoaPods：
+
+```bash
+# 安装 rbenv
+brew install rbenv ruby-build
+echo 'eval "$(rbenv init - zsh)"' >> ~/.zshrc
+source ~/.zshrc
+
+# 安装 Ruby 3.3.8
+rbenv install 3.3.8
+rbenv global 3.3.8
+
+# 安装 CocoaPods
+gem install cocoapods
+```
+
+## 编译运行
+
+```bash
+# macOS 桌面
+flutter run -d macos
+
+# iOS 模拟器
+open -a Simulator
+flutter run -d ios
+
+# Release 版本
+flutter build macos --release
+# 输出：build/macos/Build/Products/Release/focus_buddy.app
+```
+
+## 常见问题
+
+### CocoaPods 错误
+```bash
+cd ios && pod install && cd ..
+flutter clean && flutter pub get
+```
+
+### 构建缓存问题
+```bash
+flutter clean
+flutter pub get
+```
+
+### Xcode 签名
+打开 `ios/Runner.xcworkspace`，在 "Signing & Capabilities" 配置开发团队
+
+## 开发提示
+
+运行时快捷键：
+- `r` - 热重载
+- `R` - 热重启
+- `q` - 退出
+
+代码检查：
+```bash
+flutter analyze
+flutter test
+```