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

frontend/src/components/Dashboard.vue

@@ -81,6 +81,7 @@ import api from '../utils/api'
 import { ElMessage } from 'element-plus'
 import { Refresh, Paperclip } from '@element-plus/icons-vue'
 import PinnedProject from './PinnedProject.vue'
+import { formatDate } from '../utils/date.util'
 
 interface Props {
   todayBids: any[]
@@ -160,11 +161,6 @@ watch(dateRange, () => {
   }
 })
 
-const formatDate = (dateString: string) => {
-  if (!dateString) return '-'
-  return new Date(dateString).toLocaleDateString()
-}
-
 // 过滤 Today's Bids，只显示包含所选关键字的项目，并且在日期范围内
 const filteredTodayBids = computed(() => {
   let result = props.todayBids