feat: update date format

frontend/admin/src/pages/UserPage.vue

@@ -1,8 +1,6 @@
 <script setup>
 import { userService } from '@/api/userService';
-import dayjs from 'dayjs';
-import timezone from 'dayjs/plugin/timezone';
-import utc from 'dayjs/plugin/utc';
+import { formatDate } from '@/utils/date';
 import Badge from 'primevue/badge';
 import Button from 'primevue/button';
 import Column from 'primevue/column';
@@ -38,10 +36,6 @@ const users = ref({
 const first = ref(0);
 const rows = ref(10);
 
-// 配置 dayjs
-dayjs.extend(utc);
-dayjs.extend(timezone);
-
 const fetchUsers = async () => {
     loading.value = true;
     try {
@@ -78,10 +72,6 @@ const onSearch = (event) => {
     }, 300);
 };
 
-const formatDate = (date) => {
-    return dayjs.tz(date, 'Asia/Shanghai').format('YYYY-MM-DD HH:mm:ss');
-};
-
 const handleDelete = (user) => {
     confirm.require({
         message: `确定要删除用户 "${user.username}" 吗?`,