style(backend): apply ruff format

apps/backend/schemas/auth.py

@@ -4,17 +4,20 @@ from pydantic import BaseModel, Field
 
 class QRCodeRequest(BaseModel):
     """请求二维码 Schema"""
+
     alias: str = Field(..., description="用户别名")
 
 
 class QRCodeResponse(BaseModel):
     """二维码响应 Schema"""
+
     session_id: str = Field(..., description="会话 ID")
     qrcode_image: str = Field(..., description="二维码 Base64 图片")
 
 
 class QRCodeStatusResponse(BaseModel):
     """二维码状态响应 Schema"""
+
     status: str = Field(..., description="状态: pending/waiting_scan/success/error")
     message: Optional[str] = Field(None, description="状态消息")
     user_id: Optional[int] = Field(None, description="用户 ID (扫码成功时返回)")
@@ -24,11 +27,13 @@ class QRCodeStatusResponse(BaseModel):
 
 class TokenVerifyRequest(BaseModel):
     """Token 验证请求 Schema"""
+
     authorization: str = Field(..., description="Token")
 
 
 class TokenVerifyResponse(BaseModel):
     """Token 验证响应 Schema"""
+
     is_valid: bool = Field(..., description="Token 是否有效")
     message: str = Field(..., description="验证消息")
     user_id: Optional[int] = Field(None, description="用户 ID")
@@ -36,12 +41,14 @@ class TokenVerifyResponse(BaseModel):
 
 class AliasLoginRequest(BaseModel):
     """别名+密码登录请求 Schema"""
+
     alias: str = Field(..., min_length=2, max_length=50, description="用户别名")
     password: str = Field(..., min_length=6, description="密码")
 
 
 class AliasLoginResponse(BaseModel):
     """别名+密码登录响应 Schema"""
+
     success: bool = Field(..., description="登录是否成功")
     message: str = Field(..., description="登录消息")
     user_id: Optional[int] = Field(None, description="用户 ID")