fix extrasgroup as backend request

src/pages/checkout/hooks/useOrder.ts

@@ -69,7 +69,7 @@ export default function useOrder() {
       items: items.map((i) => ({
         ...i,
         qty: i.quantity,
-        extras: i.extras || [],
+        extras: i.extras?.map((e) => e.id) || [],
         extrasgroup: i.extrasgroup || [],
         order_item_comment: i.comment || "",
       })),