feat: 重构AI推荐功能并优化爬虫基础URL

重构前端AI推荐组件，移除本地过滤逻辑，改为从后端获取日期范围内的数据
新增AI服务模块，包含Prompt和推荐逻辑
为投标服务添加按日期范围查询接口
统一各爬虫服务的baseURL格式

src/bids/controllers/bid.controller.ts

@@ -24,4 +24,9 @@ export class BidsController {
   getSources() {
     return this.bidsService.getSources();
   }
+
+  @Get('by-date-range')
+  getByDateRange(@Query('startDate') startDate: string, @Query('endDate') endDate: string) {
+    return this.bidsService.getBidsByDateRange(startDate, endDate);
+  }
 }

src/bids/services/bid.service.ts

@@ -87,4 +87,22 @@ export class BidsService {
       .orderBy('bid.publishDate', 'DESC')
       .getMany();
   }
+
+  async getBidsByDateRange(startDate?: string, endDate?: string) {
+    const qb = this.bidRepository.createQueryBuilder('bid');
+
+    if (startDate) {
+      const start = new Date(startDate);
+      start.setHours(0, 0, 0, 0);
+      qb.andWhere('bid.publishDate >= :startDate', { startDate: start });
+    }
+
+    if (endDate) {
+      const end = new Date(endDate);
+      end.setHours(23, 59, 59, 999);
+      qb.andWhere('bid.publishDate <= :endDate', { endDate: end });
+    }
+
+    return qb.orderBy('bid.publishDate', 'DESC').getMany();
+  }
 }