feat: 初始化考培练系统项目

- 从服务器拉取完整代码
- 按框架规范整理项目结构
- 配置 Drone CI 测试环境部署
- 包含后端(FastAPI)、前端(Vue3)、管理端

技术栈: Vue3 + TypeScript + FastAPI + MySQL

backend/app/models/user.py

@@ -0,0 +1,171 @@
+"""
+用户相关数据模型
+"""
+
+from datetime import datetime
+from typing import List, Optional
+
+from sqlalchemy import (
+    Boolean,
+    Column,
+    DateTime,
+    ForeignKey,
+    Integer,
+    String,
+    Table,
+    Text,
+    UniqueConstraint,
+    func,
+)
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from .base import Base, BaseModel, SoftDeleteMixin
+
+# 用户-团队关联表（用于多对多关系）
+user_teams = Table(
+    "user_teams",
+    BaseModel.metadata,
+    Column(
+        "user_id", Integer, ForeignKey("users.id", ondelete="CASCADE"), primary_key=True
+    ),
+    Column(
+        "team_id", Integer, ForeignKey("teams.id", ondelete="CASCADE"), primary_key=True
+    ),
+    Column("role", String(50), default="member", nullable=False),  # member, leader
+    Column("joined_at", DateTime, server_default=func.now(), nullable=False),
+    UniqueConstraint("user_id", "team_id", name="uq_user_team"),
+)
+
+
+class UserTeam(Base):
+    """用户团队关联模型（用于直接查询关联表）"""
+
+    __allow_unmapped__ = True
+    __table__ = user_teams  # 重用已定义的表
+
+    # 定义列映射（不需要id，因为使用复合主键）
+    user_id: Mapped[int]
+    team_id: Mapped[int]
+    role: Mapped[str]
+    joined_at: Mapped[datetime]
+
+    def __repr__(self) -> str:
+        return f"<UserTeam(user_id={self.user_id}, team_id={self.team_id}, role={self.role})>"
+
+
+class User(BaseModel, SoftDeleteMixin):
+    """用户模型"""
+
+    __allow_unmapped__ = True
+
+    __tablename__ = "users"
+
+    # 基础信息
+    username: Mapped[str] = mapped_column(String(50), unique=True, nullable=False)
+    email: Mapped[Optional[str]] = mapped_column(String(100), unique=True, nullable=True)
+    phone: Mapped[Optional[str]] = mapped_column(String(20), unique=True, nullable=True)
+    hashed_password: Mapped[str] = mapped_column(
+        "password_hash", String(200), nullable=False
+    )
+
+    # 个人信息
+    full_name: Mapped[Optional[str]] = mapped_column(String(100), nullable=True)
+    avatar_url: Mapped[Optional[str]] = mapped_column(String(500), nullable=True)
+    bio: Mapped[Optional[str]] = mapped_column(Text, nullable=True)
+    # 性别: male/female（可扩展）
+    gender: Mapped[Optional[str]] = mapped_column(String(10), nullable=True)
+    # 学校
+    school: Mapped[Optional[str]] = mapped_column(String(100), nullable=True)
+    # 专业
+    major: Mapped[Optional[str]] = mapped_column(String(100), nullable=True)
+    # 企微员工userid（用于SCRM系统对接）
+    wework_userid: Mapped[Optional[str]] = mapped_column(String(64), unique=True, nullable=True, comment="企微员工userid")
+
+    # 系统角色：admin, manager, trainee
+    role: Mapped[str] = mapped_column(String(20), default="trainee", nullable=False)
+
+    # 账号状态
+    is_active: Mapped[bool] = mapped_column(Boolean, default=True, nullable=False)
+    is_verified: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
+
+    # 时间记录
+    last_login_at: Mapped[Optional[datetime]] = mapped_column(DateTime, nullable=True)
+    password_changed_at: Mapped[Optional[datetime]] = mapped_column(
+        DateTime, nullable=True
+    )
+
+    # 关联关系
+    teams: Mapped[List["Team"]] = relationship(
+        "Team",
+        secondary=user_teams,
+        back_populates="members",
+        lazy="selectin",
+    )
+    exams = relationship("Exam", back_populates="user")
+    
+    # 岗位关系（通过关联表）
+    position_memberships = relationship("PositionMember", back_populates="user", cascade="all, delete-orphan")
+
+    def __repr__(self) -> str:
+        return f"<User(id={self.id}, username={self.username}, role={self.role})>"
+
+
+class Team(BaseModel, SoftDeleteMixin):
+    """团队模型"""
+
+    __allow_unmapped__ = True
+
+    __tablename__ = "teams"
+
+    # 基础信息
+    name: Mapped[str] = mapped_column(String(100), unique=True, nullable=False)
+    code: Mapped[str] = mapped_column(String(50), unique=True, nullable=False)
+    description: Mapped[Optional[str]] = mapped_column(Text, nullable=True)
+
+    # 团队类型：department, project, study_group
+    team_type: Mapped[str] = mapped_column(
+        String(50), default="department", nullable=False
+    )
+
+    # 状态
+    is_active: Mapped[bool] = mapped_column(Boolean, default=True, nullable=False)
+
+    # 团队负责人
+    leader_id: Mapped[Optional[int]] = mapped_column(
+        Integer, ForeignKey("users.id", ondelete="SET NULL"), nullable=True
+    )
+
+    # 父团队（支持层级结构）
+    parent_id: Mapped[Optional[int]] = mapped_column(
+        Integer, ForeignKey("teams.id", ondelete="CASCADE"), nullable=True
+    )
+
+    # 关联关系
+    members: Mapped[List["User"]] = relationship(
+        "User",
+        secondary=user_teams,
+        back_populates="teams",
+        lazy="selectin",
+    )
+
+    leader: Mapped[Optional["User"]] = relationship(
+        "User",
+        foreign_keys=[leader_id],
+        lazy="selectin",
+    )
+
+    parent: Mapped[Optional["Team"]] = relationship(
+        "Team",
+        remote_side="Team.id",
+        foreign_keys=[parent_id],
+        lazy="selectin",
+    )
+
+    children: Mapped[List["Team"]] = relationship(
+        "Team",
+        back_populates="parent",
+        lazy="selectin",
+    )
+
+    def __repr__(self) -> str:
+        return f"<Team(id={self.id}, name={self.name}, code={self.code})>"