fix: 글 목록 0개일 때 표시 수정

frontend/src/components/ArticleBoard/ArticleBoard.jsx

@@ -1,6 +1,7 @@
 import EditIcon from '/src/assets/icons/edit.svg?react';
 import { Link } from 'react-router-dom';
 import styles from './ArticleBoard.module.css';
+import { Children } from 'react';
 
 export default function ArticleBoard({ title, canCreate, children }) {
   return (
@@ -19,7 +20,7 @@ export default function ArticleBoard({ title, canCreate, children }) {
         )}
       </div>
       <div className={styles.article}>
-        {children ? children : <div className={styles.empty}>표시할 내용이 없습니다.</div>}
+        {Children.toArray(children).length ? children : <div className={styles.empty}>표시할 내용이 없습니다.</div>}
       </div>
     </div>
   );

frontend/src/pages/FreeboardListPage/FreeboardListPage.jsx

@@ -7,14 +7,14 @@ import IntersectionArea from '../../components/IntersectionArea/IntersectionObse
 export default function NoticeListPage() {
   const { lectureId } = useParams();
   const { data, fetchNextPage, hasNextPage } = useFreeboards(lectureId);
-  const articles = data?.pages.flatMap((page) => page.data);
+  const articles = data.pages.flatMap((page) => page.data);
 
   return (
     <ArticleBoard
       title="자유게시판"
       canCreate={true}
     >
-      {articles.length &&
+      {articles.length > 0 &&
         articles.map?.((notice) => (
           <ArticleLink
             key={`${notice.id}`}

frontend/src/pages/NoticeListPage/NoticeListPage.jsx

@@ -8,7 +8,7 @@ import IntersectionArea from '../../components/IntersectionArea/IntersectionObse
 export default function NoticeListPage() {
   const { lectureId } = useParams();
   const { data, fetchNextPage, hasNextPage } = useNotices(lectureId);
-  const notices = data?.pages.flatMap((page) => page.data);
+  const notices = data.pages.flatMap((page) => page.data);
   const userType = useBoundStore((state) => state.userType);
 
   return (
@@ -16,7 +16,7 @@ export default function NoticeListPage() {
       title="공지사항"
       canCreate={userType === 'teacher'}
     >
-      {notices.length &&
+      {notices.length > 0 &&
         notices.map?.((notice) => (
           <ArticleLink
             key={`${notice.id}`}

frontend/src/pages/QuestionListPage/QuestionListPage.jsx

@@ -15,7 +15,7 @@ export default function QuestionListPage() {
       title="Q&A"
       canCreate={userType === 'student'}
     >
-      {questions.length &&
+      {questions.length > 0 &&
         questions.map?.((question) => (
           <ArticleLink
             key={`${question.title}${question.createtAt}`}

frontend/src/pages/QuizsetListPage/QuizsetListPage.jsx

@@ -13,7 +13,7 @@ export default function QuizsetListPage() {
       title="퀴즈 목록"
       canCreate={true}
     >
-      {quizsets.length &&
+      {quizsets.length > 0 &&
         quizsets.map?.((quizset) => (
           <ArticleLink
             key={`${quizset.quizSetId}`}

frontend/src/pages/StudentListPage/StudentListPage.jsx

@@ -14,7 +14,7 @@ export default function StudentListPage() {
 
   return (
     <ArticleBoard title="수강생 관리">
-      {students.length &&
+      {students.length > 0 &&
         students.map?.((student) => {
           return (
             <ArticleLink

frontend/src/pages/TeacherReportsetDetailPage/TeacherReportsetDetailPage.jsx

@@ -14,7 +14,7 @@ export default function TeacherReportsetDetailPage() {
       title="퀴즈 조회"
       canCreate={false}
     >
-      {reports.length &&
+      {reports.length > 0 &&
         reports.map?.((report) => {
           return (
             <ArticleLink