Add comprehensive i18n localization to settlement entity

- Convert settlement constants to i18n-compatible getter functions
- Add 28+ translation keys to settlement namespace
- Localize 11 settlement UI components

Constant conversions:
- getSettlementPeriodTypeBtnGroup(t)
- getSettlementPaymentMethodOptionsGroup(t)

Translation keys added:
- settlement.periodType.* (settlementDate, transactionDate)
- settlement.searchCriteria, searchPeriod
- settlement.settlementCompleted, depositScheduled
- settlement.settlementInfo, transferStatus, transferId, transferTime
- settlement.bankName, accountNumber, depositorName
- settlement.settlementDepositAmount, errorReason
- settlement.transactionDetailInfo
- settlement.cardBankTelecom, approvalAccountPhone
- common.weekdays.* (sun-sat)
- common.currencyUnit

Localized components:
- filter/list-filter.tsx
- calandar-wrap.tsx, calendar-grid.tsx
- calendar-settlement-item.tsx, calandar-amount-row.tsx
- info-wrap/settlement-info-wrap.tsx
- info-wrap/transaction-info-wrap.tsx
- list-summary-extend-settlement.tsx
- list-summary-extend-transaction.tsx

All settlement components now support Korean/English language switching.

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

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

src/entities/settlement/ui/calendar-settlement-item.tsx

@@ -1,5 +1,6 @@
 import moment from 'moment';
 import { NumericFormat } from 'react-number-format';
+import { useTranslation } from 'react-i18next';
 import { PATHS } from '@/shared/constants/paths';
 import { useNavigate } from '@/shared/lib/hooks/use-navigate';
 import { SettlementDays, SettlementStatus } from '../model/types';
@@ -14,6 +15,7 @@ export const CalendarSettlementItem = ({
   settlementStatus
 }: CalendarSettlementItemProps) => {
   const { navigate } = useNavigate();
+  const { t } = useTranslation();
 
   const getAmount = (
     scheduledAmount: number | undefined, 
@@ -65,10 +67,10 @@ export const CalendarSettlementItem = ({
           </div>
           <div className="settlement-amount">
             <NumericFormat
-              value={ getAmount(value?.scheduledAmount, value?.completedAmount) } 
+              value={ getAmount(value?.scheduledAmount, value?.completedAmount) }
               thousandSeparator
               displayType="text"
-              suffix='원'
+              suffix={t('common.currencyUnit')}
             ></NumericFormat>
           </div>
         </div>