Refactor and enhance OAuth2.0 implementation; update models and routes

- Refactored AdminSummaryData and AdminSummaryResponse classes for better clarity.
- Added OAUTH type to SettingsType enum.
- Cleaned up imports in webdav.py.
- Updated admin router to improve summary data retrieval and response handling.
- Enhanced file management routes with better condition handling and user storage updates.
- Improved group management routes by optimizing data retrieval.
- Refined task management routes for better condition handling.
- Updated user management routes to streamline access token retrieval.
- Implemented a new captcha verification structure with abstract base class.
- Removed deprecated env.md file and replaced with a new structured version.
- Introduced a unified OAuth2.0 client base class for GitHub and QQ integrations.
- Enhanced password management with improved hashing strategies.
- Added detailed comments and documentation throughout the codebase for clarity.

main.py

@@ -33,8 +33,22 @@ app = FastAPI(
     openapi_url="/openapi.json" if appmeta.debug else None,
 )
 
+# 添加跨域 CORS 中间件,仅在调试模式下启用,以允许所有来源访问 API
+if appmeta.debug:
+    from fastapi.middleware.cors import CORSMiddleware
+    app.add_middleware(
+        CORSMiddleware,
+        allow_origins=["*"],
+        allow_credentials=True,
+        allow_methods=["*"],
+        allow_headers=["*"],
+    )
+
 @app.exception_handler(Exception)
-async def handle_unexpected_exceptions(request: Request, exc: Exception) -> NoReturn:
+async def handle_unexpected_exceptions(
+    request: Request, 
+    exc: Exception
+) -> NoReturn:
     """
     捕获所有未经处理的 FastAPI 异常,防止敏感信息泄露。
     """