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.

routers/api/v1/admin/group/__init__.py

@@ -63,12 +63,13 @@ async def router_admin_get_group(
     :param group_id: 用户组UUID
     :return: 用户组详情
     """
-    group = await Group.get(session, Group.id == group_id, load=Group.options)
+    group = await Group.get(session, Group.id == group_id, load=[Group.options, Group.policies])
 
     if not group:
         raise HTTPException(status_code=404, detail="用户组不存在")
 
-    policies = await group.awaitable_attrs.policies
+    # 直接访问已加载的关系，无需额外查询
+    policies = group.policies
     user_count = await User.count(session, User.group_id == group_id)
     response = GroupDetailResponse.from_group(group, user_count, policies)