feat: [stocks] 재고생산 목록에 로트번호 컬럼 추가, 생산사유 컬럼 제거

- 생산번호 옆에 로트번호 컬럼 추가 (bendingLot.lotNumber)
- 생산사유 컬럼 제거 (동일값이라 불필요)
- 검색 필터도 생산사유 → 로트번호로 변경

src/components/stocks/StockProductionList.tsx

@@ -141,7 +141,7 @@ export function StockProductionList() {
         !searchTerm ||
         order.orderNo.toLowerCase().includes(searchLower) ||
         order.itemSummary.toLowerCase().includes(searchLower) ||
-        order.productionReason.toLowerCase().includes(searchLower);
+        (order.bendingLot?.lotNumber || '').toLowerCase().includes(searchLower);
 
       const statusFilter = filterValues.status as string;
       const matchesFilter = !statusFilter || statusFilter === "all" || order.status === statusFilter;
@@ -255,9 +255,9 @@ export function StockProductionList() {
   const tableColumns: TableColumn[] = useMemo(() => [
     { key: "rowNumber", label: "번호", className: "px-2 text-center w-[60px]" },
     { key: "orderNo", label: "생산번호", className: "px-2", sortable: true, copyable: true },
+    { key: "lotNumber", label: "로트번호", className: "px-2", copyable: true },
     { key: "itemSummary", label: "품목", className: "px-2", sortable: true, copyable: true },
     { key: "quantity", label: "수량", className: "px-2 text-center", sortable: true },
-    { key: "productionReason", label: "생산사유", className: "px-2", copyable: true },
     { key: "createdAt", label: "등록일", className: "px-2", sortable: true, copyable: true },
     { key: "status", label: "상태", className: "px-2 text-center", sortable: true },
     { key: "memo", label: "비고", className: "px-2", copyable: true },
@@ -286,9 +286,15 @@ export function StockProductionList() {
             {order.orderNo}
           </code>
         </TableCell>
+        <TableCell>
+          {order.bendingLot?.lotNumber ? (
+            <code className="text-xs bg-blue-50 text-blue-700 px-2 py-1 rounded font-mono">
+              {order.bendingLot.lotNumber}
+            </code>
+          ) : "-"}
+        </TableCell>
         <TableCell>{order.itemSummary || "-"}</TableCell>
         <TableCell className="text-center">{order.quantity || "-"}</TableCell>
-        <TableCell>{order.productionReason || "-"}</TableCell>
         <TableCell>{order.createdAt || "-"}</TableCell>
         <TableCell className="text-center">{getStatusBadge(order.status)}</TableCell>
         <TableCell className="max-w-[150px] truncate">{order.memo || "-"}</TableCell>
@@ -327,7 +333,7 @@ export function StockProductionList() {
           <div className="grid grid-cols-2 gap-x-4 gap-y-3">
             <InfoField label="수량" value={`${order.quantity}`} />
             <InfoField label="등록일" value={order.createdAt || "-"} />
-            <InfoField label="생산사유" value={order.productionReason || "-"} />
+            <InfoField label="로트번호" value={order.bendingLot?.lotNumber || "-"} />
             <InfoField label="품목 수" value={`${order.itemCount}개`} />
           </div>
         }
@@ -409,7 +415,7 @@ export function StockProductionList() {
 
     computeStats: () => stats,
 
-    searchPlaceholder: "생산번호, 품목명, 생산사유 검색...",
+    searchPlaceholder: "생산번호, 품목명, 로트번호 검색...",
 
     dateRangeSelector: {
       enabled: true,
@@ -430,7 +436,7 @@ export function StockProductionList() {
       return (
         order.orderNo.toLowerCase().includes(s) ||
         order.itemSummary.toLowerCase().includes(s) ||
-        order.productionReason.toLowerCase().includes(s)
+        (order.bendingLot?.lotNumber || '').toLowerCase().includes(s)
       );
     },