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/interfaces/http/__init__.py

@@ -0,0 +1 @@
+"""HTTP interface composition."""

zhixing-server/src/zhixing_server/interfaces/http/router.py

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+"""Top-level HTTP route catalogs."""
+
+from fastapi import APIRouter
+
+from zhixing_server.interfaces.http.system import operational_router, system_router
+
+api_v1_router = APIRouter(prefix="/api/v1")
+api_v1_router.include_router(system_router, prefix="/system", tags=["system"])
+
+__all__ = ["api_v1_router", "operational_router"]

zhixing-server/src/zhixing_server/interfaces/http/system.py

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+"""Operational endpoints that do not belong to a business context."""
+
+from typing import Annotated, Literal
+
+from fastapi import APIRouter, Depends
+from pydantic import BaseModel
+
+from zhixing_server.bootstrap.config import Settings, get_settings
+
+operational_router = APIRouter()
+system_router = APIRouter()
+
+
+class HealthResponse(BaseModel):
+    """Minimal response used by container health probes."""
+
+    status: Literal["ok"]
+
+
+class SystemStatusResponse(HealthResponse):
+    """Non-domain runtime metadata displayed by the frontend smoke slice."""
+
+    service: str
+    environment: str
+
+
+@operational_router.get("/healthz", response_model=HealthResponse, include_in_schema=False)
+def health() -> HealthResponse:
+    """Report whether the HTTP process can serve requests.
+
+    Returns:
+        A stable response suitable for container health checks.
+    """
+    return HealthResponse(status="ok")
+
+
+@system_router.get("/status", response_model=SystemStatusResponse)
+def system_status(settings: Annotated[Settings, Depends(get_settings)]) -> SystemStatusResponse:
+    """Expose safe runtime metadata for end-to-end connectivity checks.
+
+    Args:
+        settings: Validated process settings injected by FastAPI.
+
+    Returns:
+        The service name, environment, and current availability state.
+    """
+    return SystemStatusResponse(
+        status="ok",
+        service=settings.app_name,
+        environment=settings.app_env,
+    )