fix lint errors

apps/app/src/components/PageComment/Comment.tsx

@@ -1,6 +1,6 @@
 import React, { useEffect, useMemo, useState } from 'react';
 
-import type { IUser } from '@growi/core';
+import { isPopulated, type IUser } from '@growi/core';
 import * as pathUtils from '@growi/core/dist/utils/path-utils';
 import { UserPicture } from '@growi/ui/dist/components';
 import { format, parseISO } from 'date-fns';
@@ -51,7 +51,7 @@ export const Comment = (props: CommentProps): JSX.Element => {
   const [isReEdit, setIsReEdit] = useState(false);
 
   const commentId = comment._id;
-  const creator = comment.creator;
+  const creator = isPopulated(comment.creator) ? comment.creator : undefined;
   const createdAt = new Date(comment.createdAt);
   const updatedAt = new Date(comment.updatedAt);
   const isEdited = createdAt < updatedAt;

apps/app/src/components/PageComment/DeleteCommentModal.tsx

@@ -1,5 +1,6 @@
 import React from 'react';
 
+import { isPopulated } from '@growi/core';
 import { UserPicture } from '@growi/ui/dist/components';
 import { format } from 'date-fns';
 import {
@@ -47,6 +48,8 @@ export const DeleteCommentModal = (props: DeleteCommentModalProps): JSX.Element
 
     const commentDate = format(new Date(comment.createdAt), 'yyyy/MM/dd HH:mm');
 
+    const creator = isPopulated(comment.creator) ? comment.creator : undefined;
+
     let commentBody = comment.comment;
     if (commentBody.length > OMIT_BODY_THRES) { // omit
       commentBody = `${commentBody.substr(0, OMIT_BODY_THRES)}...`;
@@ -55,7 +58,7 @@ export const DeleteCommentModal = (props: DeleteCommentModalProps): JSX.Element
 
     return (
       <>
-        <UserPicture user={comment.creator} size="xs" /> <strong><Username user={comment.creator}></Username></strong> wrote on {commentDate}:
+        <UserPicture user={creator} size="xs" /> <strong><Username user={creator}></Username></strong> wrote on {commentDate}:
         <p className="card custom-card comment-body mt-2 p-2">{commentBodyElement}</p>
       </>
     );