feat: Refactor EditModal for improved INSERT/UPDATE handling

- Introduced a new state flag `isCreateModeFlag` to determine the mode (INSERT or UPDATE) directly from the event, enhancing clarity in the modal's behavior.
- Updated the logic for initializing `originalData` and determining the mode, ensuring that the modal correctly identifies whether to create or update based on the provided data.
- Refactored the update logic to send the entire `formData` without relying on `originalData`, streamlining the update process.
- Enhanced logging for better debugging and understanding of the modal's state during operations.

frontend/lib/registry/components/selected-items-detail-input/SelectedItemsDetailInputComponent.tsx

@@ -596,6 +596,11 @@ export const SelectedItemsDetailInputComponent: React.FC<SelectedItemsDetailInpu
           const additionalFields = componentConfig.additionalFields || [];
           const mainTable = componentConfig.targetTable!;
 
+          // 수정 모드 감지: URL에 mode=edit가 있으면 수정 모드
+          // 수정 모드에서는 항상 deleteOrphans=true (기존 레코드 교체, 복제 방지)
+          const urlParams = typeof window !== "undefined" ? new URLSearchParams(window.location.search) : null;
+          const isEditMode = urlParams?.get("mode") === "edit";
+
           // fieldGroup별 sourceTable 분류
           const groupsByTable = new Map<string, typeof groups>();
           groups.forEach((group) => {
@@ -686,9 +691,10 @@ export const SelectedItemsDetailInputComponent: React.FC<SelectedItemsDetailInpu
                 });
               });
 
-              // 레코드에 id(기존 DB PK)가 있으면 EDIT 모드 → 고아 삭제
-              // id 없으면 CREATE 모드 → 기존 레코드 건드리지 않음
+              // 수정 모드이거나 레코드에 id(기존 DB PK)가 있으면 → 고아 삭제 (기존 레코드 교체)
+              // 신규 등록이고 id 없으면 → 기존 레코드 건드리지 않음
               const mappingHasDbIds = mappingRecords.some((r) => !!r.id);
+              const shouldDeleteOrphans = isEditMode || mappingHasDbIds;
               // 저장된 매핑 ID를 추적 (디테일 테이블에 mapping_id 주입용)
               let savedMappingIds: string[] = [];
               try {
@@ -696,7 +702,7 @@ export const SelectedItemsDetailInputComponent: React.FC<SelectedItemsDetailInpu
                   mainTable,
                   itemParentKeys,
                   mappingRecords,
-                  { deleteOrphans: mappingHasDbIds },
+                  { deleteOrphans: shouldDeleteOrphans },
                 );
                 // 백엔드에서 반환된 저장된 레코드 ID 목록
                 if (mappingResult.success && mappingResult.savedIds) {
@@ -775,12 +781,13 @@ export const SelectedItemsDetailInputComponent: React.FC<SelectedItemsDetailInpu
                 }
 
                 const priceHasDbIds = priceRecords.some((r) => !!r.id);
+                const shouldDeleteDetailOrphans = isEditMode || priceHasDbIds;
                 try {
                   const detailResult = await dataApi.upsertGroupedRecords(
                     detailTable,
                     itemParentKeys,
                     priceRecords,
-                    { deleteOrphans: priceHasDbIds },
+                    { deleteOrphans: shouldDeleteDetailOrphans },
                   );
 
                   if (!detailResult.success) {
@@ -805,8 +812,10 @@ export const SelectedItemsDetailInputComponent: React.FC<SelectedItemsDetailInpu
             // 단일 테이블 저장 (기존 로직 - detailTable 없는 경우)
             // ============================================================
             const records = generateCartesianProduct(items);
+            const singleHasDbIds = records.some((r) => !!r.id);
+            const shouldDeleteSingleOrphans = isEditMode || singleHasDbIds;
 
-            const result = await dataApi.upsertGroupedRecords(mainTable, parentKeys, records);
+            const result = await dataApi.upsertGroupedRecords(mainTable, parentKeys, records, { deleteOrphans: shouldDeleteSingleOrphans });
 
             if (result.success) {
               window.dispatchEvent(