Sard Uniapp is a UI component library built on Uniapp + Vue 3 framework providing 117+ reusable components for cross-platform application development. The library follows a modular architecture where each component includes implementation, type definitions, styling, and unit tests. Key features include tree shaking support, TypeScript integration, theme customization, internationalization, dark mode support, and >80% unit test coverage. The library is designed for multi-end compatibility targeting H5, WeChat mini-program, Alipay mini-program, and native Apps (excluding nvue/uvue).