refactor: improve date handling and timezone consistency

- Add timezone support to database module (+08:00)
- Extract date formatting utilities to shared modules
- Standardize timezone handling across frontend and backend
- Improve date formatting consistency in UI components
- Refactor crawler page.goto options for better readability

src/bids/services/bid.service.ts

@@ -3,6 +3,11 @@ import { InjectRepository } from '@nestjs/typeorm';
 import { Repository, LessThan } from 'typeorm';
 import { BidItem } from '../entities/bid-item.entity';
 import { CrawlInfoAdd } from '../../crawler/entities/crawl-info-add.entity';
+import {
+  getDaysAgo,
+  setStartOfDay,
+  setEndOfDay,
+} from '../../common/utils/timezone.util';
 
 interface FindAllQuery {
   page?: number;
@@ -73,8 +78,7 @@ export class BidsService {
   }
 
   async cleanOldData() {
-    const thirtyDaysAgo = new Date();
-    thirtyDaysAgo.setDate(thirtyDaysAgo.getDate() - 30);
+    const thirtyDaysAgo = getDaysAgo(30);
     return this.bidRepository.delete({
       createdAt: LessThan(thirtyDaysAgo),
     });
@@ -91,9 +95,7 @@ export class BidsService {
   }
 
   async getRecentBids() {
-    const thirtyDaysAgo = new Date();
-    thirtyDaysAgo.setDate(thirtyDaysAgo.getDate() - 30);
-    thirtyDaysAgo.setHours(0, 0, 0, 0);
+    const thirtyDaysAgo = setStartOfDay(getDaysAgo(30));
 
     return this.bidRepository
       .createQueryBuilder('bid')
@@ -118,14 +120,12 @@ export class BidsService {
     const qb = this.bidRepository.createQueryBuilder('bid');
 
     if (startDate) {
-      const start = new Date(startDate);
-      start.setHours(0, 0, 0, 0);
+      const start = setStartOfDay(new Date(startDate));
       qb.andWhere('bid.publishDate >= :startDate', { startDate: start });
     }
 
     if (endDate) {
-      const end = new Date(endDate);
-      end.setHours(23, 59, 59, 999);
+      const end = setEndOfDay(new Date(endDate));
       qb.andWhere('bid.publishDate <= :endDate', { endDate: end });
     }