refactor(structure): reorganize app layout

BREAKING CHANGE: root backend/frontend directories and old run/manage entrypoints were removed. Use apps/backend, apps/frontend, and python main.py commands instead.

apps/backend/schemas/auth.py

@@ -0,0 +1,49 @@
+from typing import Optional
+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)")
+    authorization: Optional[str] = Field(None, description="Token (扫码成功时返回)")
+    qrcode_image: Optional[str] = Field(None, description="二维码 Base64 图片（等待扫描时返回）")
+
+
+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")
+
+
+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")
+    authorization: Optional[str] = Field(None, description="Token")
+    alias: Optional[str] = Field(None, description="用户别名")