[EC-238] fix: 유고결석 부분 수정` (#248)

Author: devyejin

api/src/main/java/org/example/educheck/domain/absenceattendance/service/AbsenceAttendanceService.java

@@ -69,7 +69,10 @@ private static void validateModifiable(AbsenceAttendance absenceAttendance) {
     }
 
     private static void validateAttendanceAbsenceCancellable(AbsenceAttendance absenceAttendance) {
-        if (absenceAttendance.getIsApprove().equals('T') || absenceAttendance.getIsApprove().equals('F')) {
+
+        Character isApprove = absenceAttendance.getIsApprove();
+
+        if (isApprove != null && (isApprove.equals('T') || isApprove.equals('F'))) {
             throw new InvalidRequestException("처리된 신청 내역은 취소할 수 없습니다.");
         }
     }

client/src/components/listItem/leftLineListItem/LeftLineListItem.jsx

@@ -5,7 +5,7 @@ import MoreButton from '../../buttons/moreButton/MoreButton';
 
 
 export default function LeftLineListItem({
-  isClickable,
+  isClickable = false,
   handleClick,
   status,
   children,

client/src/pages/studentAttendanceAbsence/StudentAttendanceAbsence.jsx

@@ -331,7 +331,7 @@ export default function StudentAttendanceAbsence() {
     return (
       <LeftLineListItem
         key={index}
-        isClickable={true}
+        isClickable={false}
         status={statusText}
         children={modifiedItem}
         handleClick ={() => handleTagChange(item)}