feat: [재고생산] 복사 버튼 추가 + STOCK LOT 번호 개선

src/components/stocks/BendingLotForm.tsx

@@ -240,11 +240,13 @@ export function BendingLotForm({ initialData, isEditMode = false }: BendingLotFo
   const locale = (params.locale as string) || 'ko';
   const basePath = `/${locale}/sales/stocks`;
 
+  const isCopyMode = !isEditMode && !!initialData;
+
   const [form, setForm] = useState<BendingFormState>(() => {
     if (initialData?.bendingLot) {
       const bl = initialData.bendingLot;
       return {
-        regDate: initialData.regDate || getInitialForm().regDate,
+        regDate: isCopyMode ? getInitialForm().regDate : (initialData.regDate || getInitialForm().regDate),
         prodCode: bl.prodCode || '',
         specCode: bl.specCode || '',
         lengthCode: bl.lengthCode || '',
@@ -264,7 +266,11 @@ export function BendingLotForm({ initialData, isEditMode = false }: BendingLotFo
   const [rawLotModalOpen, setRawLotModalOpen] = useState(false);
   const [fabricLotModalOpen, setFabricLotModalOpen] = useState(false);
 
-  const config = isEditMode ? bendingEditConfig : bendingCreateConfig;
+  const config = isEditMode
+    ? bendingEditConfig
+    : isCopyMode
+      ? { ...bendingCreateConfig, description: '기존 재고생산을 복사하여 등록합니다' }
+      : bendingCreateConfig;
 
   // 코드맵 로드 + edit mode 시 초기 품목 매핑 조회
   useEffect(() => {

src/components/stocks/StockProductionDetail.tsx

@@ -18,8 +18,10 @@ import {
   MessageSquare,
   Tag,
   Layers,
+  Copy,
 } from 'lucide-react';
 import { toast } from 'sonner';
+import { Button } from '@/components/ui/button';
 import { IntegratedDetailTemplate } from '@/components/templates/IntegratedDetailTemplate';
 import { FormSection } from '@/components/organisms/FormSection';
 import {
@@ -257,7 +259,16 @@ export function StockProductionDetail({ orderId }: StockProductionDetailProps) {
           }
           return { success: result.success, error: result.error };
         }}
-        headerActions={null}
+        headerActions={
+          <Button
+            variant="outline"
+            size="sm"
+            onClick={() => router.push(`${basePath}?mode=new&copyFrom=${orderId}`)}
+          >
+            <Copy className="h-4 w-4 mr-1" />
+            복사
+          </Button>
+        }
         renderView={(data) => renderViewContent(data as unknown as StockOrder)}
       />
     </>