React Native and Expo development guide covering components, styling, animations, navigation, state management, forms, networking, performance optimization, testing, native capabilities, and engineering (project structure, deployment, SDK upgrades, CI/CD). Use when: building React Native or Expo apps, implementing animations or native UI, managing state, fetching data, writing tests, optimizing performance, deploying to App Store/Play Store, setting up CI/CD, upgrading Expo SDK, or configuring Tailwind/NativeWind.

React Native 和 Expo 开发指南，涵盖组件、样式、动画、导航、状态管理、表单、网络请求、性能优化、测试、原生能力以及工程实践（项目结构、部署、SDK 升级、CI/CD） 适用于：开发 React Native 或 Expo 应用、实现动画或原生 UI、管理状态、获取数据、编写测试、优化性能、发布至 App Store 或 Google Play、配置 CI/CD、升级 Expo SDK 或设置 Tailwind/NativeWind