接口跑通，基础功能全部实现

backend/auth_service/app/schemas/user.py

@@ -28,12 +28,17 @@ class UserUpdate(BaseModel):
     email: Optional[EmailStr] = None
     is_active: Optional[bool] = None
 
-class UserResponse(UserBase):
+class UserResponse(BaseModel):
     """Schema for user response data"""
     id: UUID
+    username: str
+    email: Optional[EmailStr] = None
     created_at: datetime
     is_active: bool
-    
+    wx_openid: Optional[str] = None
+    wx_nickname: Optional[str] = None
+    wx_avatar: Optional[str] = None
+
     class Config:
         from_attributes = True  # Enable ORM mode
 
@@ -64,3 +69,10 @@ class TokenData(BaseModel):
     sub: str = Field(..., description="Subject (user ID)")
     username: str = Field(..., description="Username")
     exp: Optional[int] = None
+
+
+class WxLoginRequest(BaseModel):
+    """微信小程序登录请求"""
+    code: str = Field(..., description="wx.login() 获取的临时登录凭证")
+    nickname: Optional[str] = Field(None, max_length=100, description="微信昵称")
+    avatar_url: Optional[str] = Field(None, max_length=500, description="微信头像 URL")