링크결제 Step1: 언어별 날짜 표시 순서 개선

- 영문(en)일 때: "Until" + 날짜 선택
- 한글(ko)일 때: 날짜 선택 + "까지"
- i18n.language 기반 조건부 렌더링 적용

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

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

src/entities/additional-service/ui/link-payment/apply/link-payment-step1.tsx

@@ -14,9 +14,10 @@ interface LinkPaymentStep1Props {
 }
 
 export const LinkPaymentStep1 = ({ formData, setFormData }: LinkPaymentStep1Props) => {
-  const { t } = useTranslation();
+  const { t, i18n } = useTranslation();
   const { navigate } = useNavigate();
   const midOptionsWithoutGids = useStore.getState().UserStore.selectOptionsMidsWithoutGids;
+  const isEnglish = i18n.language === 'en';
 
   useSetOnBack(() => {
     navigate(PATHS.additionalService.linkPayment.shippingHistory);
@@ -137,13 +138,14 @@ export const LinkPaymentStep1 = ({ formData, setFormData }: LinkPaymentStep1Prop
           <div className="issue-label">{t('additionalService.linkPayment.paymentValidDate')}</div>
           <div className="issue-field">
             <div className="link-apply-date">
+              {isEnglish && <span>{t('additionalService.linkPayment.until')}</span>}
               <SingleDatePicker
                 date={formData.paymentLimitDate}
                 setDate={handleDateChange}
                 placeholder={t('additionalService.linkPayment.selectDate')}
                 minDate={new Date()}
               />
-              <span>{t('additionalService.linkPayment.until')}</span>
+              {!isEnglish && <span>{t('additionalService.linkPayment.until')}</span>}
             </div>
           </div>
         </div>