Add localization for payment method and currency in transaction/settlement modules

- Add payment method name localization mapping for both Korean and English
- Support payment methods: Credit Card, Virtual Account, Account Transfer, Simple Account Transfer, Mobile Payment, SSG Money, SSG Bank Account, Culture Voucher, Tmoney Pay
- Update transaction list to use localized currency format (ko: 9,999,999원, en: ₩9,999,999)
- Apply localization to payment method dropdown options in filters and list pages
- Update settlement transaction info to display localized payment method names

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

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

src/locales/en.json

@@ -93,7 +93,7 @@
         "periods": {
           "today": "Today",
           "week": "1 Week",
-          "currentMonth": "Current Month",
+          "currentMonth": "Current",
           "1month": "1 Month",
           "2months": "2 Months",
           "3months": "3 Months",