refactor(i18n): use JSON with flattened key and namespace (#30114)

Co-authored-by: yyh <yuanyouhuilyz@gmail.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

web/app/components/header/account-setting/data-source-page/data-source-notion/index.tsx

@@ -65,7 +65,7 @@ const DataSourceNotion: FC<Props> = ({
       else if (data.data === 'internal') {
         Toast.notify({
           type: 'info',
-          message: t('common.dataSource.notion.integratedAlert'),
+          message: t('dataSource.notion.integratedAlert', { ns: 'common' }),
         })
       }
     }