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/src/zhixing_server/modules/README.md

@@ -0,0 +1,14 @@
+# Bounded contexts
+
+Create a module here only after its domain language and ownership boundary are understood:
+
+```text
+<bounded_context>/
+├── domain/          # Entities, value objects, domain services, ports
+├── application/     # Use cases and orchestration
+├── infrastructure/  # Adapters for storage and external systems
+└── presentation/    # HTTP or message-driven delivery adapters
+```
+
+The domain layer must not import FastAPI, persistence clients, or infrastructure adapters.
+

zhixing-server/src/zhixing_server/modules/__init__.py

@@ -0,0 +1 @@
+"""Business bounded contexts live below this package."""