Add permission checks and localization improvements

- Add grant check (64, 'X') to QNA register page
- Add grant check (45, 'X') to user login auth modification
- Replace hardcoded Korean permission messages with i18n key 'common.nopermission'
- Add 'nopermission' translation key to both en.json and ko.json
- Update .env.development to use development API endpoints

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/pages/support/qna/list-page.tsx

@@ -141,7 +141,7 @@ export const QnaListPage = () => {
       navigate(PATHS.support.qna.register);
     }
     else{
-      showAlert('권한이 없습니다.');
+      showAlert(t('common.nopermission'));
     }
   };
 

src/pages/support/qna/register-page.tsx

@@ -3,7 +3,7 @@ import { PATHS } from '@/shared/constants/paths';
 import { useNavigate } from '@/shared/lib/hooks/use-navigate';
 import { useQnaSaveMutation } from '@/entities/support/api/use-qna-save-mutation';
 import { HeaderType } from '@/entities/common/model/types';
-import { 
+import {
 	useSetHeaderTitle,
 	useSetHeaderType,
 	useSetFooterMode,
@@ -15,6 +15,7 @@ import { PatternFormat } from 'react-number-format';
 import { overlay } from 'overlay-kit';
 import { Dialog } from '@/shared/ui/dialogs/dialog';
 import { QnaSaveParams, QnaSaveResponse } from '@/entities/support/model/types';
+import { checkGrant } from '@/shared/lib/check-grant';
 
 export enum QnaRegisterPropsName {
   Mid = 'Mid',
@@ -142,6 +143,10 @@ export const QnaRegisterPage = () => {
   };
 
   const onClickToRegisterQna = () => {
+    if (!checkGrant(64, 'X')) {
+      showAlert(t('common.noPermission'));
+      return;
+    }
     callRegister();
   };