update:1.更新根据分析建议重新生成章节内容

backend/app/models/user.py

@@ -0,0 +1,47 @@
+"""
+用户数据模型 - 存储用户基本信息
+"""
+from sqlalchemy import Column, String, Integer, Boolean, DateTime
+from sqlalchemy.sql import func
+from app.database import Base
+
+
+class User(Base):
+    """用户模型 - 存储OAuth和本地用户信息"""
+    __tablename__ = "users"
+    
+    user_id = Column(String(100), primary_key=True, index=True, comment="用户ID，格式：linuxdo_{id} 或 local_{id}")
+    username = Column(String(100), nullable=False, index=True, comment="用户名")
+    display_name = Column(String(200), nullable=False, comment="显示名称")
+    avatar_url = Column(String(500), nullable=True, comment="头像URL")
+    trust_level = Column(Integer, default=0, comment="信任等级（仅用于显示）")
+    is_admin = Column(Boolean, default=False, comment="是否为管理员")
+    linuxdo_id = Column(String(100), nullable=False, unique=True, index=True, comment="LinuxDO用户ID或本地用户ID")
+    created_at = Column(DateTime(timezone=True), server_default=func.now(), comment="创建时间")
+    last_login = Column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now(), comment="最后登录时间")
+    
+    def to_dict(self):
+        """转换为字典"""
+        return {
+            "user_id": self.user_id,
+            "username": self.username,
+            "display_name": self.display_name,
+            "avatar_url": self.avatar_url,
+            "trust_level": self.trust_level,
+            "is_admin": self.is_admin,
+            "linuxdo_id": self.linuxdo_id,
+            "created_at": self.created_at.isoformat() if self.created_at else None,
+            "last_login": self.last_login.isoformat() if self.last_login else None,
+        }
+
+
+class UserPassword(Base):
+    """用户密码模型 - 存储用户密码信息"""
+    __tablename__ = "user_passwords"
+    
+    user_id = Column(String(100), primary_key=True, index=True, comment="用户ID")
+    username = Column(String(100), nullable=False, comment="用户名")
+    password_hash = Column(String(64), nullable=False, comment="密码哈希（SHA256）")
+    has_custom_password = Column(Boolean, default=False, comment="是否为自定义密码")
+    created_at = Column(DateTime(timezone=True), server_default=func.now(), comment="创建时间")
+    updated_at = Column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now(), comment="更新时间")