fix: 修复 HTTPBearer 返回 422 错误的问题

- 设置 HTTPBearer(auto_error=False) 避免验证错误
- 在 get_current_user 中手动检查并返回 401

backend/app/routers/auth.py

@@ -22,7 +22,7 @@ from ..models.tenant_app import TenantApp
 from ..models.tenant_wechat_app import TenantWechatApp
 
 router = APIRouter(prefix="/auth", tags=["认证"])
-security = HTTPBearer()
+security = HTTPBearer(auto_error=False)
 
 
 class LoginRequest(BaseModel):
@@ -48,24 +48,33 @@ class ChangePasswordRequest(BaseModel):
 # 权限依赖
 
 async def get_current_user(
-    credentials: HTTPAuthorizationCredentials = Depends(security),
+    credentials: Optional[HTTPAuthorizationCredentials] = Depends(security),
     db: Session = Depends(get_db)
 ) -> User:
     """获取当前用户"""
+    if not credentials:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="需要登录认证",
+            headers={"WWW-Authenticate": "Bearer"}
+        )
+    
     token = credentials.credentials
     token_data = decode_token(token)
     
     if not token_data:
         raise HTTPException(
             status_code=status.HTTP_401_UNAUTHORIZED,
-            detail="Token 无效或已过期"
+            detail="Token 无效或已过期",
+            headers={"WWW-Authenticate": "Bearer"}
         )
     
     user = db.query(User).filter(User.id == token_data.user_id).first()
     if not user or user.status != 1:
         raise HTTPException(
             status_code=status.HTTP_401_UNAUTHORIZED,
-            detail="用户不存在或已禁用"
+            detail="用户不存在或已禁用",
+            headers={"WWW-Authenticate": "Bearer"}
         )
     
     return user