feat(calculate): 라이브 환불 기능 API 연동 및 UI 수정

- refundLive API 요청 파라미터를 canUsage에서 canUsageStr로 변경
- CalculateLive 화면의 환불 함수에서 canUsageStr을 전달하도록 수정
- API URL(/admin/calculate/live/refund) 및 필드 요구사항 반영

src/api/calculate.js

@@ -138,6 +138,15 @@ async function deleteCreatorSettlementRatio(memberId) {
     return Vue.axios.post('/admin/calculate/ratio/delete/' + memberId);
 }
 
+async function refundLive(roomId, canUsageStr) {
+    const request = {
+        roomId: roomId,
+        canUsageStr: canUsageStr
+    };
+
+    return Vue.axios.post('/admin/calculate/live/refund', request);
+}
+
 export {
     getCalculateLive,
     getCalculateContent,
@@ -148,6 +157,7 @@ export {
     createCreatorSettlementRatio,
     updateCreatorSettlementRatio,
     deleteCreatorSettlementRatio,
+    refundLive,
     getCalculateLiveByCreator,
     getCalculateContentByCreator,
     getCalculateCommunityByCreator,