后端开发完成

backend/app/schemas/user.py

@@ -0,0 +1,38 @@
+from pydantic import BaseModel, EmailStr
+from datetime import datetime
+from typing import Optional
+
+
+class UserBase(BaseModel):
+    """用户基础模型"""
+    username: str
+    department: str
+    role: str
+
+
+class UserCreate(UserBase):
+    """创建用户模型"""
+    password: str
+
+
+class UserUpdate(BaseModel):
+    """更新用户模型"""
+    password: Optional[str] = None
+    department: Optional[str] = None
+    role: Optional[str] = None
+
+
+class UserResponse(UserBase):
+    """用户响应模型"""
+    id: int
+    created_at: datetime
+    updated_at: Optional[datetime] = None
+    
+    class Config:
+        from_attributes = True
+
+
+class UserLogin(BaseModel):
+    """用户登录模型"""
+    username: str
+    password: str