后端开发完成

backend/app/models/user.py

@@ -0,0 +1,16 @@
+from sqlalchemy import Column, Integer, String, DateTime
+from sqlalchemy.sql import func
+from app.database.database import Base
+
+
+class User(Base):
+    """用户模型"""
+    __tablename__ = "users"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    username = Column(String(50), unique=True, index=True, nullable=False)
+    password = Column(String(100), nullable=False)
+    department = Column(String(50), nullable=False)
+    role = Column(String(20), nullable=False)  # admin, marketing, other
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(DateTime(timezone=True), onupdate=func.now())