Apply localization to account-holder-search pages

- Replace hardcoded Korean text with i18n translation keys
- Update page titles, form labels, and button text
- Localize error messages and console logs
- Apply to list page, detail page, and request page
- Support dynamic language switching (ko/en)

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

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

src/pages/additional-service/account-holder-search/account-holder-search-page.tsx

@@ -51,7 +51,7 @@ export const AccountHolderSearchPage = () => {
   const [resultStatus, setResultStatus] = useState<AccountHolderResultStatus>(AccountHolderResultStatus.ALL);
   const [emailBottomSheetOn, setEmailBottomSheetOn] = useState<boolean>(false);
 
-  useSetHeaderTitle('계좌성명조회');
+  useSetHeaderTitle(t('additionalService.services.accountHolderSearch'));
   useSetHeaderType(HeaderType.LeftArrow);
   useSetFooterMode(false);
   useSetOnBack(() => {
@@ -196,11 +196,11 @@ export const AccountHolderSearchPage = () => {
                   />
                   <button
                     className="filter-btn"
-                    aria-label="필터"
+                    aria-label={t('filter.filter')}
                   >
                     <img
                       src={IMAGE_ROOT + '/ico_setting.svg'}
-                      alt="검색옵션"
+                      alt={t('filter.searchOptions')}
                       onClick={() => onClickToOpenFilter()}
                     />
                   </button>
@@ -211,7 +211,7 @@ export const AccountHolderSearchPage = () => {
                 >
                   <img
                     src={IMAGE_ROOT + '/ico_download.svg'}
-                    alt="다운로드"
+                    alt={t('filter.download')}
                   />
                 </button>
               </div>
@@ -222,8 +222,8 @@ export const AccountHolderSearchPage = () => {
                 sortType={sortType}
                 onClickToSort={onClickToSort}
                 sortOptions={[
-                  { key: SortTypeKeys.LATEST, label: '최신순' },
-                  { key: SortTypeKeys.OLDEST, label: '오래된순' }
+                  { key: SortTypeKeys.LATEST, label: t('common.latest') },
+                  { key: SortTypeKeys.OLDEST, label: t('common.oldest') }
                 ]}
               ></SortTypeBox>
               <div className="excrow">