Add localization for alarm notification categories

- Add translation keys for alarm categories in ko.json and en.json
- Implement getCategoryLabel function to map category codes to localized labels
- Sort categories to display "etc" category at the end
- Replace hardcoded desc1 values with localized category labels

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

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

src/locales/ko.json

@@ -1278,7 +1278,16 @@
         "title": "알림함",
         "all": "전체",
         "retentionNotice": "※ 알림은 90일간 보관 후 삭제됩니다.",
-        "goTo": "{{category}} 바로가기"
+        "goTo": "{{category}} 바로가기",
+        "categories": {
+            "benefits": "혜택/이벤트",
+            "notice": "공지사항",
+            "serviceGuide": "서비스안내",
+            "etc": "기타",
+            "settlement": "정산",
+            "settlementStatus": "정산 현황",
+            "settlementLimit": "정산 한도"
+        }
     },
     "faceAuth": {
         "title": "안면인증"