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-server/README.md

@@ -0,0 +1,13 @@
+# Zhixing Server
+
+FastAPI 后端使用 Python 3.12 与 `uv`。业务代码按限界上下文组织；只有真实业务需求明确后才在 `src/zhixing_server/modules/` 下新增上下文。
+
+```bash
+uv sync
+uv run uvicorn zhixing_server.main:app --reload
+uv run pytest
+uv run ruff format --check .
+uv run ruff check .
+uv run pyright
+```
+