Localize FAQ detail page header title

Replace hardcoded Korean text '자주 묻는 질문' with dynamic
translation key using useTranslation hook.

Changes:
- Import useTranslation from react-i18next
- Replace hardcoded title with t('support.faq.title')
- Maintains consistency with FAQ list page localization

Note: FAQ list-page.tsx was already fully localized.
Translation key 'support.faq.title' already exists in en.json.

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

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

src/pages/support/faq/detail-page.tsx

@@ -3,6 +3,7 @@ import { PATHS } from '@/shared/constants/paths';
 import { useLocation } from 'react-router';
 import { useNavigate } from '@/shared/lib/hooks/use-navigate';
 import { HeaderType } from '@/entities/common/model/types';
+import { useTranslation } from 'react-i18next';
 import {
   useSetHeaderTitle,
   useSetHeaderType,
@@ -13,6 +14,7 @@ import {
 export const FaqDetailPage = () => {
   const { navigate } = useNavigate();
   const location = useLocation();
+  const { t } = useTranslation();
 
   const [cursorId, setCursorId] = useState<number>(0);
   const [seq, setSeq] = useState<string>('');
@@ -20,7 +22,7 @@ export const FaqDetailPage = () => {
   const [title, setTitle] = useState<string>('');
   const [contents, setContents] = useState<string>('');
 
-  useSetHeaderTitle('자주 묻는 질문');
+  useSetHeaderTitle(t('support.faq.title'));
   useSetHeaderType(HeaderType.LeftArrow);
   useSetFooterMode(false);
   useSetOnBack(() => {