统一时间格式和时区

frontend/src/pages/PlatformMerchants.tsx

@@ -16,10 +16,10 @@ import {
 } from 'antd'
 import { GiftOutlined, PlusOutlined, ReloadOutlined, TeamOutlined } from '@ant-design/icons'
 import type { ColumnsType } from 'antd/es/table'
-import dayjs from 'dayjs'
 import { useNavigate } from 'react-router-dom'
 import { platformApi } from '../api'
 import type { Merchant, MerchantMember, PageResult, ProductCatalogItem } from '../types'
+import { formatDateTime } from '../utils/time'
 
 const memberRoleOptions = [
   { value: 'owner', label: '负责人' },
@@ -195,7 +195,7 @@ export default function PlatformMerchants() {
       ),
     },
     { title: '状态', dataIndex: 'status', width: 90, render: (v) => v === 'active' ? <Tag color="green">启用</Tag> : <Tag>禁用</Tag> },
-    { title: '创建时间', dataIndex: 'created_at', width: 160, render: (v) => dayjs(v).format('YYYY-MM-DD HH:mm') },
+    { title: '创建时间', dataIndex: 'created_at', width: 180, render: formatDateTime },
     {
       title: '操作',
       key: 'action',