fix: 발송/미발송 예약 메일 Local Standard Time(Lst)로 수정

Author: xaexunxang

src/shared/lib/date.ts

@@ -44,11 +44,8 @@ export const formatDateLocalString = (date: Date, time: string): string => {
   return `${year}-${month}-${day}T${hour}:${minute}:00`;
 };
 
-export const formatUtcToKst = (utcString: string): string => {
-  const utcDate = new Date(utcString);
-
-  const kstTimestamp = utcDate.getTime() + 9 * 60 * 60 * 1000;
-  const kstDate = new Date(kstTimestamp);
+export const formatLst = (utcString: string): string => {
+  const kstDate = new Date(utcString);
 
   const year = kstDate.getFullYear();
   const month = (kstDate.getMonth() + 1).toString().padStart(2, '0');

src/widgets/dashboard/ui/email/SentMailCard.tsx

@@ -1,7 +1,7 @@
 import arrow from '../../../../../public/assets/dashboard/mail/Arrow.svg';
 import { useState } from 'react';
 import IconButton from '../../../../../design-system/ui/buttons/IconButton';
-import { formatUtcToKst } from '../../../../shared/lib/date';
+import { formatLst } from '../../../../shared/lib/date';
 import TertiaryButton from '../../../../../design-system/ui/buttons/TertiaryButton';
 import { useNavigate, useParams } from 'react-router-dom';
 import { ReadEmailResponse } from '../../../../features/dashboard/model/email';
@@ -38,7 +38,7 @@ const SentMailCard = ({ mail, isPending = false, onClickDelete }: SentMailCardPr
             <p>{mail.title}</p>
           </div>
           <p className="text-sm text-placeholderText">
-            {formatUtcToKst(mail.reservationDate)}
+            {formatLst(mail.reservationDate)}
           </p>
         </div>
         <IconButton