Add localization for account holder auth and search detail pages

- Replace hardcoded Korean strings with translation keys in detail pages
- Add new translation keys for account holder services:
  - accountHolderAuth: title, detailTitle, requestDate, requestWay
  - accountHolderSearch: title, detailTitle
- Add 'result' key to common translations for reusability
- All labels now support Korean and English through i18n

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

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

src/locales/en.json

@@ -42,6 +42,7 @@
         "requestDate": "Request Date",
         "failed": "Failed",
         "clear": "Clear",
+        "result": "Result",
         "currency": {
             "krw": "KRW"
         }
@@ -925,11 +926,17 @@
             "paymentRequest": "Payment Request"
         },
         "accountHolderAuth": {
+            "title": "Account Holder Authentication",
+            "detailTitle": "Account Holder Authentication Details",
+            "requestDate": "Request Date & Time",
+            "requestWay": "Request Method",
             "accountHolderNameMatch": "Account Holder Name Match",
             "accountHolderNameMismatch": "Account Holder Name Mismatch",
             "authFailedAccountError": "Authentication Failed (Account Error, etc.)"
         },
         "accountHolderSearch": {
+            "title": "Account Holder Search",
+            "detailTitle": "Account Holder Search Details",
             "accountHolder": "Account Holder",
             "accountNumber": "Account Number",
             "accountHolderOrAccountNumber": "Account Holder/Account Number",