Localize payout pages (detail, list, request)

- Added payout-specific translation keys to en.json:
  - depositBalance, subId, disbursementAmount, requestFailed
- Added common translation keys: filter, download, searchOptions, failed, clear, currency.krw
- Localized detail-page.tsx:
  - Header title, button text, detail section title
  - All KV labels (disbursementStatus, transactionType, etc.)
  - Updated code comments from Korean to English
- Localized list-page.tsx:
  - Header title, aria-labels, alt texts
  - Deposit balance label and currency unit
  - Request button text
- Localized request-page.tsx:
  - Header title, form labels, placeholder text
  - Success/error messages in snackBar calls
  - Added useTranslation hook import

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

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

src/pages/additional-service/payout/list-page.tsx

@@ -34,7 +34,7 @@ import { useExtensionAccessCheck } from '@/shared/lib/hooks/use-extension-access
 import useIntersectionObserver from '@/widgets/intersection-observer';
 
 export const PayoutListPage = () => {
-  // 권한 체크
+  // Access check
   const { hasAccess, AccessDeniedDialog } = useExtensionAccessCheck({
     extensionCode: 'PAYOUT'
   });
@@ -74,7 +74,7 @@ export const PayoutListPage = () => {
     onIntersect 
   });
 
-  useSetHeaderTitle('지급대행');
+  useSetHeaderTitle(t('additionalService.payout.title'));
   useSetHeaderType(HeaderType.LeftArrow);
   useSetFooterMode(false);
   useSetOnBack(() => {
@@ -244,32 +244,32 @@ export const PayoutListPage = () => {
                   />
                   <button
                     className="filter-btn"
-                    aria-label="필터"
+                    aria-label={t('common.filter')}
                     onClick={() => onClickToOpenFilter()}
                   >
                     <img
                       src={IMAGE_ROOT + '/ico_setting.svg'}
-                      alt="검색옵션"
+                      alt={t('common.searchOptions')}
                     />
                   </button>
                 </div>
                 <button
                   className="download-btn"
-                  aria-label="다운로드"
+                  aria-label={t('common.download')}
                   onClick={() => onClickToOpenEmailBottomSheet()}
                 >
                   <img
                     src={IMAGE_ROOT + '/ico_download.svg'}
-                    alt="다운로드"
+                    alt={t('common.download')}
                   />
                 </button>
               </div>
               <div className="account-frame">
                 <div className="credit-summary">
                   <div className="row">
-                    <span className="label">예치금 잔액</span>
+                    <span className="label">{t('additionalService.payout.depositBalance')}</span>
                     <span className="amount22">
-                      50,000,000<span className="unit">원</span>
+                      50,000,000<span className="unit">{t('common.currency.krw')}</span>
                     </span>
                   </div>
                 </div>
@@ -303,7 +303,7 @@ export const PayoutListPage = () => {
               <button
                 className="btn-50 btn-blue flex-1"
                 onClick={() => onClickToNavigation()}
-              >지급대행 신청</button>
+              >{t('additionalService.payout.requestTitle')}</button>
             </div>
           </div>
         </div>