feat：实现通知系统核心功能

- 添加通知实体和数据传输对象
- 实现通知服务层逻辑，支持创建、查询、标记已读
- 添加通知REST API控制器
- 实现WebSocket网关，支持实时通知推送
- 支持系统通知、用户通知、广播通知三种类型
- 支持定时通知功能，每分钟自动检查待发送通知
- 添加通知模块导出

src/business/notice/notice.controller.ts

@@ -0,0 +1,87 @@
+import {
+  Controller,
+  Get,
+  Post,
+  Body,
+  Param,
+  Patch,
+  Query,
+  ParseIntPipe,
+  UseGuards,
+} from '@nestjs/common';
+import { ApiTags, ApiOperation, ApiResponse, ApiBearerAuth } from '@nestjs/swagger';
+import { NoticeService } from './notice.service';
+import { CreateNoticeDto } from './dto/create-notice.dto';
+import { NoticeResponseDto } from './dto/notice-response.dto';
+import { JwtAuthGuard } from '../auth/jwt_auth.guard';
+import { CurrentUser } from '../auth/current_user.decorator';
+
+@ApiTags('通知管理')
+@Controller('api/notices')
+@UseGuards(JwtAuthGuard)
+@ApiBearerAuth()
+export class NoticeController {
+  constructor(private readonly noticeService: NoticeService) {}
+
+  @Post()
+  @ApiOperation({ summary: '创建通知' })
+  @ApiResponse({ status: 201, description: '通知创建成功', type: NoticeResponseDto })
+  async create(@Body() createNoticeDto: CreateNoticeDto): Promise<NoticeResponseDto> {
+    return this.noticeService.create(createNoticeDto);
+  }
+
+  @Get()
+  @ApiOperation({ summary: '获取通知列表' })
+  @ApiResponse({ status: 200, description: '获取成功', type: [NoticeResponseDto] })
+  async findAll(
+    @CurrentUser() user: any,
+    @Query('all') all?: string,
+  ): Promise<NoticeResponseDto[]> {
+    // 如果是管理员且指定了all参数，返回所有通知
+    const userId = all === 'true' && user.isAdmin ? undefined : user.id;
+    return this.noticeService.findAll(userId);
+  }
+
+  @Get('unread-count')
+  @ApiOperation({ summary: '获取未读通知数量' })
+  @ApiResponse({ status: 200, description: '获取成功' })
+  async getUnreadCount(@CurrentUser() user: any): Promise<{ count: number }> {
+    const count = await this.noticeService.getUserUnreadCount(user.id);
+    return { count };
+  }
+
+  @Get(':id')
+  @ApiOperation({ summary: '获取通知详情' })
+  @ApiResponse({ status: 200, description: '获取成功', type: NoticeResponseDto })
+  async findOne(@Param('id', ParseIntPipe) id: number): Promise<NoticeResponseDto> {
+    return this.noticeService.findById(id);
+  }
+
+  @Patch(':id/read')
+  @ApiOperation({ summary: '标记通知为已读' })
+  @ApiResponse({ status: 200, description: '标记成功', type: NoticeResponseDto })
+  async markAsRead(
+    @Param('id', ParseIntPipe) id: number,
+    @CurrentUser() user: any,
+  ): Promise<NoticeResponseDto> {
+    return this.noticeService.markAsRead(id, user.id);
+  }
+
+  @Post('system')
+  @ApiOperation({ summary: '发送系统通知' })
+  @ApiResponse({ status: 201, description: '发送成功', type: NoticeResponseDto })
+  async sendSystemNotice(
+    @Body() body: { title: string; content: string; userId?: number },
+  ): Promise<NoticeResponseDto> {
+    return this.noticeService.sendSystemNotice(body.title, body.content, body.userId);
+  }
+
+  @Post('broadcast')
+  @ApiOperation({ summary: '发送广播通知' })
+  @ApiResponse({ status: 201, description: '发送成功', type: NoticeResponseDto })
+  async sendBroadcast(
+    @Body() body: { title: string; content: string },
+  ): Promise<NoticeResponseDto> {
+    return this.noticeService.sendBroadcast(body.title, body.content);
+  }
+}