feat: Implement orphan record deletion logic based on edit mode

- Updated the DataService to conditionally delete orphan records only when in EDIT mode, controlled by the deleteOrphans flag.
- Enhanced the SelectedItemsDetailInputComponent to determine the mode (EDIT or CREATE) based on the presence of existing database IDs, ensuring that orphan records are only deleted when necessary.
- Improved data integrity by preventing unintended deletions during the CREATE process.

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

@@ -686,11 +686,15 @@ 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
+              const mappingHasDbIds = mappingRecords.some((r) => !!r.id);
               try {
                 const mappingResult = await dataApi.upsertGroupedRecords(
                   mainTable,
                   itemParentKeys,
                   mappingRecords,
+                  { deleteOrphans: mappingHasDbIds },
                 );
               } catch (err) {
                 console.error(`❌ ${mainTable} 저장 실패:`, err);
@@ -751,11 +755,13 @@ export const SelectedItemsDetailInputComponent: React.FC<SelectedItemsDetailInpu
                   priceRecords.push(emptyRecord);
                 }
 
+                const priceHasDbIds = priceRecords.some((r) => !!r.id);
                 try {
                   const detailResult = await dataApi.upsertGroupedRecords(
                     detailTable,
                     itemParentKeys,
                     priceRecords,
+                    { deleteOrphans: priceHasDbIds },
                   );
 
                   if (!detailResult.success) {
@@ -767,12 +773,14 @@ export const SelectedItemsDetailInputComponent: React.FC<SelectedItemsDetailInpu
               }
             }
 
-            // 저장 성공 이벤트
+            // 저장 성공 이벤트 + 테이블 새로고침 (모든 아이템 저장 완료 후)
             window.dispatchEvent(
               new CustomEvent("formSaveSuccess", {
                 detail: { message: "데이터가 저장되었습니다." },
               }),
             );
+            // 분할 패널 우측 데이터 새로고침
+            window.dispatchEvent(new CustomEvent("refreshTable"));
           } else {
             // ============================================================
             // 단일 테이블 저장 (기존 로직 - detailTable 없는 경우)