fix: add someone for anonymous user display

i18n/en_US.yaml

@@ -332,6 +332,7 @@ ui:
     achievement: Achievements
     all_read: Mark all as read
     show_more: Show more
+    someone: Someone
   suspended:
     title: Your Account has been Suspended
     until_time: "Your account was suspended until {{ time }}."

i18n/zh_CN.yaml

@@ -316,6 +316,7 @@ ui:
     achievement: 成就
     all_read: 全部标记为已读
     show_more: 显示更多
+    someone: 有人
   suspended:
     title: 账号已封禁
     until_time: "你的账号被封禁至{{ time }}。"

ui/src/pages/Users/Notifications/components/Inbox/index.tsx

@@ -1,5 +1,6 @@
 import { ListGroup } from 'react-bootstrap';
 import { Link } from 'react-router-dom';
+import { useTranslation } from 'react-i18next';
 
 import classNames from 'classnames';
 import { isEmpty } from 'lodash';
@@ -7,6 +8,7 @@ import { isEmpty } from 'lodash';
 import { FormatTime, Empty } from '@/components';
 
 const Inbox = ({ data, handleReadNotification }) => {
+  const { t } = useTranslation('translation', { keyPrefix: 'notifications' });
   if (!data) {
     return null;
   }
@@ -40,12 +42,13 @@ const Inbox = ({ data, handleReadNotification }) => {
               !item.is_read && 'warning',
             )}>
             <div>
-              {item.user_info.status !== 'deleted' ? (
+              {item.user_info && item.user_info.status !== 'deleted' ? (
                 <Link to={`/users/${item.user_info.username}`}>
                   {item.user_info.display_name}{' '}
                 </Link>
               ) : (
-                <span>{item.user_info.display_name} </span>
+                // someone for anonymous user display
+                <span>{item.user_info?.display_name || t('someone')} </span>
               )}
               {item.notification_action}{' '}
               <Link to={url} onClick={() => handleReadNotification(item.id)}>