-Key In 결제 요청 카드번호 4자 제한

- SMS 결제통보 필드 변경 수정

src/pages/additional-service/key-in-payment/requeset-page.tsx

@@ -124,8 +124,14 @@ export const KeyInPaymentRequestPage = () => {
     };
 
     const isValidCardNumber = () => {
-        return cardNo1.length === 4 && cardNo2.length === 4 &&
-            cardNo3.length === 4 && cardNo4.length === 4;
+        // 실제 숫자만 추출 (포맷팅 문자 제거)
+        const cleanCardNo1 = cardNo1.replace(/\D/g, '');
+        const cleanCardNo2 = cardNo2.replace(/\D/g, '');
+        const cleanCardNo3 = cardNo3.replace(/\D/g, '');
+        const cleanCardNo4 = cardNo4.replace(/\D/g, '');
+
+        return cleanCardNo1.length === 4 && cleanCardNo2.length === 4 &&
+            cleanCardNo3.length === 4 && cleanCardNo4.length === 4;
     };
 
     const isFormValid = () => {