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/task.py

@@ -0,0 +1,100 @@
+"""
+任务相关模型
+"""
+from datetime import datetime
+from typing import List, Optional
+from sqlalchemy import Column, Integer, String, Text, DateTime, Enum as SQLEnum, JSON, Boolean, ForeignKey
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+from app.models.base import BaseModel
+from enum import Enum
+
+
+class TaskPriority(str, Enum):
+    """任务优先级"""
+    LOW = "low"
+    MEDIUM = "medium"
+    HIGH = "high"
+
+
+class TaskStatus(str, Enum):
+    """任务状态"""
+    PENDING = "pending"  # 待开始
+    ONGOING = "ongoing"  # 进行中
+    COMPLETED = "completed"  # 已完成
+    EXPIRED = "expired"  # 已过期
+
+
+class AssignmentStatus(str, Enum):
+    """分配状态"""
+    NOT_STARTED = "not_started"
+    IN_PROGRESS = "in_progress"
+    COMPLETED = "completed"
+
+
+class Task(BaseModel):
+    """任务表"""
+    __tablename__ = "tasks"
+
+    title: Mapped[str] = mapped_column(String(200), nullable=False, comment="任务标题")
+    description: Mapped[Optional[str]] = mapped_column(Text, nullable=True, comment="任务描述")
+    priority: Mapped[TaskPriority] = mapped_column(
+        SQLEnum(TaskPriority, values_callable=lambda x: [e.value for e in x]),
+        default=TaskPriority.MEDIUM,
+        nullable=False,
+        comment="优先级"
+    )
+    status: Mapped[TaskStatus] = mapped_column(
+        SQLEnum(TaskStatus, values_callable=lambda x: [e.value for e in x]),
+        default=TaskStatus.PENDING,
+        nullable=False,
+        comment="任务状态"
+    )
+    creator_id: Mapped[int] = mapped_column(Integer, ForeignKey("users.id"), nullable=False, comment="创建人ID")
+    deadline: Mapped[Optional[datetime]] = mapped_column(DateTime, nullable=True, comment="截止时间")
+    requirements: Mapped[Optional[dict]] = mapped_column(JSON, nullable=True, comment="任务要求配置")
+    progress: Mapped[int] = mapped_column(Integer, default=0, nullable=False, comment="完成进度")
+    is_deleted: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
+
+    # 关系
+    creator = relationship("User", backref="created_tasks", foreign_keys=[creator_id])
+    course_links = relationship("TaskCourse", back_populates="task", cascade="all, delete-orphan")
+    assignments = relationship("TaskAssignment", back_populates="task", cascade="all, delete-orphan")
+
+
+class TaskCourse(BaseModel):
+    """任务课程关联表"""
+    __tablename__ = "task_courses"
+
+    task_id: Mapped[int] = mapped_column(Integer, ForeignKey("tasks.id"), nullable=False, comment="任务ID")
+    course_id: Mapped[int] = mapped_column(Integer, ForeignKey("courses.id"), nullable=False, comment="课程ID")
+
+    # 关系
+    task = relationship("Task", back_populates="course_links")
+    course = relationship("Course")
+
+
+class TaskAssignment(BaseModel):
+    """任务分配表"""
+    __tablename__ = "task_assignments"
+
+    task_id: Mapped[int] = mapped_column(Integer, ForeignKey("tasks.id"), nullable=False, comment="任务ID")
+    user_id: Mapped[int] = mapped_column(Integer, ForeignKey("users.id"), nullable=False, comment="分配用户ID")
+    team_id: Mapped[Optional[int]] = mapped_column(Integer, nullable=True, comment="团队ID")
+    status: Mapped[AssignmentStatus] = mapped_column(
+        SQLEnum(AssignmentStatus, values_callable=lambda x: [e.value for e in x]),
+        default=AssignmentStatus.NOT_STARTED,
+        nullable=False,
+        comment="完成状态"
+    )
+    progress: Mapped[int] = mapped_column(Integer, default=0, nullable=False, comment="个人完成进度")
+    completed_at: Mapped[Optional[datetime]] = mapped_column(DateTime, nullable=True, comment="完成时间")
+
+    # 关系
+    task = relationship("Task", back_populates="assignments")
+    user = relationship("User")
+
+
+__all__ = ["Task", "TaskCourse", "TaskAssignment", "TaskPriority", "TaskStatus", "AssignmentStatus"]
+
+
+