由于本次代码变更内容为空，无法生成有效的提交信息。请提供具体的代码变更内容以便生成合适的提交信息。登录、微信登录等认证功能- 添加管理员登录功能

- 实现个人资料更新和密码修改- 配置数据库连接和 Alembic 迁移
- 添加健康检查和系统统计接口
- 实现自定义错误处理和响应格式
- 配置 FastAPI 应用和中间件

fastapi-backend/app/models/user.py

@@ -0,0 +1,44 @@
+from datetime import datetime
+from sqlalchemy import Boolean, Column, String, Integer, DateTime, Enum
+from sqlalchemy.sql import func
+
+from app.db.session import Base
+
+
+class User(Base):
+    __tablename__ = "users"
+
+    id = Column(Integer, primary_key=True, index=True)
+    username = Column(String(50), unique=True, index=True, nullable=False)
+    password_hash = Column(String(255), nullable=False)
+    user_type = Column(Enum('farmer', 'merchant', 'admin', 'super_admin'), default='farmer')
+    real_name = Column(String(50))
+    nickname = Column(String(50))
+    avatar_url = Column(String(255))
+    email = Column(String(100), unique=True, index=True)
+    phone = Column(String(20), unique=True, index=True)
+    gender = Column(Enum('male', 'female', 'other'), default='other')
+    birthday = Column(DateTime)
+    status = Column(Enum('active', 'inactive'), default='active')
+    wechat_openid = Column(String(100), unique=True, index=True)
+    wechat_unionid = Column(String(100), unique=True, index=True)
+    level = Column(Integer, default=1)
+    created_at = Column(DateTime, default=func.now())
+    updated_at = Column(DateTime, default=func.now(), onupdate=func.now())
+    last_login = Column(DateTime)
+
+
+class Admin(Base):
+    __tablename__ = "admins"
+
+    id = Column(Integer, primary_key=True, index=True)
+    username = Column(String(50), unique=True, index=True, nullable=False)
+    password = Column(String(255), nullable=False)
+    email = Column(String(100), unique=True, index=True)
+    nickname = Column(String(50))
+    avatar = Column(String(255))
+    role = Column(Enum('admin', 'super_admin'), default='admin')
+    status = Column(Enum('active', 'inactive'), default='active')
+    last_login = Column(DateTime)
+    created_at = Column(DateTime, default=func.now())
+    updated_at = Column(DateTime, default=func.now(), onupdate=func.now())