refactor(FE): Show dash for missing transport per item

src/components/pages/purchase/order/PurchaseOrderDetail.tsx

@@ -563,7 +563,10 @@ const PurchaseOrderDetail = ({
     {
       header: 'Transport /Item',
       accessorKey: 'transport_per_item',
-      cell: (props) => formatCurrency(props.getValue() as number),
+      cell: (props) => {
+        const value = props.row.original.transport_per_item;
+        return value ? formatCurrency(value) : '-';
+      },
     },
   ];