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/notification.py

@@ -0,0 +1,102 @@
+"""
+站内消息通知相关的数据验证模型
+"""
+from typing import Optional, List
+from datetime import datetime
+from enum import Enum
+
+from pydantic import BaseModel, Field, ConfigDict
+
+
+class NotificationType(str, Enum):
+    """通知类型枚举"""
+    POSITION_ASSIGN = "position_assign"  # 岗位分配
+    COURSE_ASSIGN = "course_assign"      # 课程分配
+    EXAM_REMIND = "exam_remind"          # 考试提醒
+    TASK_ASSIGN = "task_assign"          # 任务分配
+    SYSTEM = "system"                    # 系统通知
+
+
+class NotificationBase(BaseModel):
+    """
+    通知基础模型
+    """
+    title: str = Field(..., min_length=1, max_length=200, description="通知标题")
+    content: Optional[str] = Field(None, description="通知内容")
+    type: NotificationType = Field(default=NotificationType.SYSTEM, description="通知类型")
+    related_id: Optional[int] = Field(None, description="关联数据ID")
+    related_type: Optional[str] = Field(None, max_length=50, description="关联数据类型")
+
+
+class NotificationCreate(NotificationBase):
+    """
+    创建通知模型
+    """
+    user_id: int = Field(..., description="接收用户ID")
+    sender_id: Optional[int] = Field(None, description="发送者用户ID")
+
+
+class NotificationBatchCreate(BaseModel):
+    """
+    批量创建通知模型（发送给多个用户）
+    """
+    user_ids: List[int] = Field(..., min_length=1, description="接收用户ID列表")
+    title: str = Field(..., min_length=1, max_length=200, description="通知标题")
+    content: Optional[str] = Field(None, description="通知内容")
+    type: NotificationType = Field(default=NotificationType.SYSTEM, description="通知类型")
+    related_id: Optional[int] = Field(None, description="关联数据ID")
+    related_type: Optional[str] = Field(None, max_length=50, description="关联数据类型")
+    sender_id: Optional[int] = Field(None, description="发送者用户ID")
+
+
+class NotificationUpdate(BaseModel):
+    """
+    更新通知模型
+    """
+    is_read: Optional[bool] = Field(None, description="是否已读")
+
+
+class NotificationInDB(NotificationBase):
+    """
+    数据库中的通知模型
+    """
+    model_config = ConfigDict(from_attributes=True)
+    
+    id: int
+    user_id: int
+    is_read: bool
+    sender_id: Optional[int] = None
+    created_at: datetime
+    updated_at: datetime
+
+
+class NotificationResponse(NotificationInDB):
+    """
+    通知响应模型（可扩展发送者信息）
+    """
+    sender_name: Optional[str] = Field(None, description="发送者姓名")
+
+
+class NotificationListResponse(BaseModel):
+    """
+    通知列表响应模型
+    """
+    items: List[NotificationResponse]
+    total: int
+    unread_count: int
+
+
+class NotificationCountResponse(BaseModel):
+    """
+    未读通知数量响应模型
+    """
+    unread_count: int
+    total: int
+
+
+class MarkReadRequest(BaseModel):
+    """
+    标记已读请求模型
+    """
+    notification_ids: Optional[List[int]] = Field(None, description="通知ID列表，为空则标记全部已读")
+