feat: 更新AI提示并增强后端功能

更新AI提示字符串包含海南地区
添加CrawlInfoAdd实体到Bids模块
优化爬虫信息统计查询
增加请求体大小限制和启用CORS
修正前端部署路径

src/bids/services/bid.service.ts

@@ -2,12 +2,15 @@ import { Injectable } from '@nestjs/common';
 import { InjectRepository } from '@nestjs/typeorm';
 import { Repository, LessThan, MoreThanOrEqual } from 'typeorm';
 import { BidItem } from '../entities/bid-item.entity';
+import { CrawlInfoAdd } from '../../crawler/entities/crawl-info-add.entity';
 
 @Injectable()
 export class BidsService {
   constructor(
     @InjectRepository(BidItem)
     private bidRepository: Repository<BidItem>,
+    @InjectRepository(CrawlInfoAdd)
+    private crawlInfoRepository: Repository<CrawlInfoAdd>,
   ) {}
 
   async findAll(query?: any) {
@@ -117,11 +120,7 @@ export class BidsService {
   }
 
   async getCrawlInfoAddStats() {
-    const { InjectRepository } = require('@nestjs/typeorm');
-    const { Repository } = require('typeorm');
-    const { CrawlInfoAdd } = require('../../crawler/entities/crawl-info-add.entity');
-
-    // 获取每个来源的最新一次爬虫记录
+    // 获取每个来源的最新一次爬虫记录（按 createdAt 降序）
     const query = `
       SELECT
         source,
@@ -130,15 +129,15 @@ export class BidsService {
         error,
         createdAt as latestUpdate
       FROM crawl_info_add
-      WHERE id IN (
-        SELECT MAX(id)
+      WHERE (source, createdAt) IN (
+        SELECT source, MAX(createdAt)
         FROM crawl_info_add
         GROUP BY source
       )
       ORDER BY source ASC
     `;
 
-    const results = await this.bidRepository.query(query);
+    const results = await this.crawlInfoRepository.query(query);
 
     return results.map((item: any) => ({
       source: item.source,