feat: 实现后端核心业务逻辑 (Auth鉴权、二维码服务、看板与产品端点)

backend/app/schemas/user.py

@@ -0,0 +1,24 @@
+"""用户 Schemas — 对接 MOM sys_user 表"""
+from pydantic import BaseModel, Field
+
+
+class LoginRequest(BaseModel):
+    username: str = Field(..., max_length=64)
+    password: str = Field(..., max_length=128)
+
+
+class UserResponse(BaseModel):
+    id: str
+    username: str
+    display_name: str
+    role: str
+    is_active: bool = True
+    created_at: str | None = None
+
+    model_config = {"from_attributes": True}
+
+
+class LoginResponse(BaseModel):
+    access_token: str
+    token_type: str = "bearer"
+    user: UserResponse