fix: use NextJS basePath and WEB_PREFIX to support custom prefix (#19497)

Co-authored-by: johnny0120 <15564476+johnny0120@users.noreply.github.com>

web/app/components/header/dataset-nav/index.tsx

@@ -14,7 +14,6 @@ import Nav from '../nav'
 import type { NavItem } from '../nav/nav-selector'
 import { fetchDatasetDetail, fetchDatasets } from '@/service/datasets'
 import type { DataSetListResponse } from '@/models/datasets'
-import { basePath } from '@/utils/var'
 
 const getKey = (pageIndex: number, previousPageData: DataSetListResponse) => {
   if (!pageIndex || previousPageData.has_more)
@@ -57,7 +56,7 @@ const DatasetNav = () => {
         icon_background: dataset.icon_background,
       })) as NavItem[]}
       createText={t('common.menus.newDataset')}
-      onCreate={() => router.push(`${basePath}/datasets/create`)}
+      onCreate={() => router.push('/datasets/create')}
       onLoadmore={handleLoadmore}
     />
   )