fix: [ecard] 분리/분개 모달에서 수정된 금액 반영

- SplitModal의 originalAmount를 effectiveSupplyAmount + effectiveTax로 변경
- 분리 저장 시 백엔드 검증도 수정된 금액 기준으로 전달

resources/views/barobill/ecard/index.blade.php

@@ -298,7 +298,9 @@ className={`px-3 py-1.5 text-xs cursor-pointer ${
 
         if (!isOpen || !log) return null;
 
-        const originalAmount = log.approvalAmount || 0;
+        const effectiveSupply = log.effectiveSupplyAmount ?? ((log.approvalAmount || 0) - (log.tax || 0));
+        const effectiveTaxVal = log.effectiveTax ?? (log.tax || 0);
+        const originalAmount = effectiveSupply + effectiveTaxVal;
         // 합계금액 = sum(공급가액 + 세액)
         const splitTotal = splits.reduce((sum, s) => sum + (parseFloat(s.supplyAmount) || 0) + (parseFloat(s.tax) || 0), 0);
         const isValid = Math.abs(originalAmount - splitTotal) < 0.01;
@@ -2382,7 +2384,7 @@ className="px-3 py-1 bg-green-500 text-white text-xs rounded-lg hover:bg-green-6
                             useDt: log.useDt,
                             useDate: log.useDate,
                             approvalNum: log.approvalNum,
-                            originalAmount: log.approvalAmount,
+                            originalAmount: (log.effectiveSupplyAmount ?? ((log.approvalAmount || 0) - (log.tax || 0))) + (log.effectiveTax ?? (log.tax || 0)),
                             merchantName: log.merchantName
                         },
                         splits: splitData