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/schemas/task.py

@@ -0,0 +1,67 @@
+"""
+任务相关Schema
+"""
+from datetime import datetime
+from typing import Optional, List
+from pydantic import BaseModel, Field
+
+
+class TaskBase(BaseModel):
+    """任务基础Schema"""
+    title: str = Field(..., description="任务标题")
+    description: Optional[str] = Field(None, description="任务描述")
+    priority: str = Field("medium", description="优先级(low/medium/high)")
+    deadline: Optional[datetime] = Field(None, description="截止时间")
+    requirements: Optional[dict] = Field(None, description="任务要求配置")
+    course_ids: List[int] = Field(default_factory=list, description="关联课程ID列表")
+    user_ids: List[int] = Field(default_factory=list, description="分配用户ID列表")
+
+
+class TaskCreate(TaskBase):
+    """创建任务"""
+    pass
+
+
+class TaskUpdate(BaseModel):
+    """更新任务"""
+    title: Optional[str] = None
+    description: Optional[str] = None
+    priority: Optional[str] = None
+    status: Optional[str] = None
+    deadline: Optional[datetime] = None
+    requirements: Optional[dict] = None
+    progress: Optional[int] = None
+
+
+class TaskResponse(BaseModel):
+    """任务响应"""
+    id: int
+    title: str
+    description: Optional[str]
+    priority: str
+    status: str
+    creator_id: int
+    deadline: Optional[datetime]
+    requirements: Optional[dict]
+    progress: int
+    created_at: datetime
+    updated_at: datetime
+    # 扩展字段
+    courses: List[str] = Field(default_factory=list, description="课程名称列表")
+    assigned_count: int = Field(0, description="分配人数")
+    completed_count: int = Field(0, description="完成人数")
+
+    class Config:
+        from_attributes = True
+
+
+class TaskStatsResponse(BaseModel):
+    """任务统计响应"""
+    total: int = Field(0, description="总任务数")
+    ongoing: int = Field(0, description="进行中")
+    completed: int = Field(0, description="已完成")
+    expired: int = Field(0, description="已过期")
+    avg_completion_rate: float = Field(0.0, description="平均完成率")
+
+
+