feat: initialize zhixing-web with React, React Router, and Tailwind CSS

- Set up the main application structure with App component and routing.
- Implemented global state management for UI theme using Zustand.
- Created API utilities for fetching system status.
- Developed system status page with responsive design and theme toggle.
- Added testing setup with Vitest and initial tests for system status page.
- Configured TypeScript with appropriate settings for the application.
- Integrated Tailwind CSS for styling and responsive design.
- Established Vite configuration for development and testing environments.

zhixing-web/README.md

@@ -0,0 +1,13 @@
+# Zhixing Web
+
+React 管理页面使用 TypeScript、Vite、shadcn/ui、TanStack Router、TanStack Query 与 Zustand。
+
+```bash
+pnpm install
+pnpm dev
+pnpm check
+pnpm test
+pnpm build
+```
+
+开发服务器将 `/api` 代理到 `VITE_DEV_API_TARGET`，默认地址为 `http://localhost:8000`。