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

src/app/[locale]/(protected)/sales/stocks/page.tsx

@@ -5,17 +5,64 @@
  *
  * - 기본: 목록 (StockProductionList)
  * - ?mode=new: 등록 (BendingLotForm — 절곡품 LOT 방식)
+ * - ?mode=new&copyFrom={id}: 복사 등록 (기존 데이터 기반)
  */
 
+import { useState, useEffect } from 'react';
 import { useSearchParams } from 'next/navigation';
+import { Loader2 } from 'lucide-react';
+import { toast } from 'sonner';
 import { StockProductionList } from '@/components/stocks/StockProductionList';
 import { BendingLotForm } from '@/components/stocks/BendingLotForm';
+import { getStockOrderById, type StockOrder } from '@/components/stocks/actions';
+
+function CopyStockContent({ copyFromId }: { copyFromId: string }) {
+  const [order, setOrder] = useState<StockOrder | null>(null);
+  const [loading, setLoading] = useState(true);
+
+  useEffect(() => {
+    async function load() {
+      try {
+        const result = await getStockOrderById(copyFromId);
+        if (result.__authError) {
+          toast.error('인증이 만료되었습니다.');
+          return;
+        }
+        if (result.success && result.data) {
+          setOrder(result.data);
+        } else {
+          toast.error(result.error || '복사할 데이터를 불러오는데 실패했습니다.');
+        }
+      } finally {
+        setLoading(false);
+      }
+    }
+    load();
+  }, [copyFromId]);
+
+  if (loading) {
+    return (
+      <div className="flex items-center justify-center min-h-[400px]">
+        <div className="flex flex-col items-center gap-4">
+          <Loader2 className="h-8 w-8 animate-spin text-blue-600" />
+          <p className="text-muted-foreground">데이터를 불러오는 중...</p>
+        </div>
+      </div>
+    );
+  }
+
+  return <BendingLotForm initialData={order ?? undefined} />;
+}
 
 export default function StocksPage() {
   const searchParams = useSearchParams();
   const mode = searchParams.get('mode');
+  const copyFrom = searchParams.get('copyFrom');
 
   if (mode === 'new') {
+    if (copyFrom) {
+      return <CopyStockContent copyFromId={copyFrom} />;
+    }
     return <BendingLotForm />;
   }
 

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)}
       />
     </>