fix: [receiving] 입고 등록 품목코드 선택 시 단위 연동

- ItemSearchModal 콜백에 unit 필드 추가
- ReceivingDetail에서 품목 선택 시 unit 세팅

src/components/material/ReceivingManagement/ReceivingDetail.tsx

@@ -791,6 +791,7 @@ export function ReceivingDetail({ id, mode = 'view' }: Props) {
             itemCode: item.code,
             itemName: item.name,
             specification: item.specification || '',
+            unit: item.unit || prev.unit || 'EA',
           }));
         }}
         itemType="RM,SM,CS"

src/components/quotes/ItemSearchModal.tsx

@@ -18,7 +18,7 @@ import type { ItemMaster, ItemType } from '@/types/item';
 interface ItemSearchModalProps {
   open: boolean;
   onOpenChange: (open: boolean) => void;
-  onSelectItem: (item: { code: string; name: string; specification?: string }) => void;
+  onSelectItem: (item: { code: string; name: string; specification?: string; unit?: string }) => void;
   tabLabel?: string;
   /** 품목 유형 필터 (예: 'RM', 'SF', 'FG') */
   itemType?: string;
@@ -59,6 +59,7 @@ export function ItemSearchModal({
       code: item.itemCode,
       name: item.itemName,
       specification: item.specification || undefined,
+      unit: item.unit || undefined,
     });
   }, [onSelectItem]);