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/bootstrap/config.py

@@ -0,0 +1,30 @@
+"""Environment-backed application configuration."""
+
+from functools import lru_cache
+from typing import Literal
+
+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+
+class Settings(BaseSettings):
+    """Validated process configuration at the application boundary."""
+
+    app_name: str = "Zhixing Server"
+    app_env: Literal["development", "test", "production"] = "development"
+    log_level: str = "INFO"
+
+    model_config = SettingsConfigDict(
+        env_file=".env",
+        env_prefix="ZHIXING_",
+        extra="ignore",
+    )
+
+
+@lru_cache
+def get_settings() -> Settings:
+    """Return one immutable-by-convention configuration object per process.
+
+    Returns:
+        Settings populated from defaults, `.env`, and process environment variables.
+    """
+    return Settings()