fix: pass special instructions comment to order items in ProductDialog

Author: Salah Aldin Fateh

pos/src/components/ProductDialog.tsx

@@ -252,7 +252,8 @@ const ProductDialog: React.FC<ProductDialogProps> = ({
     const orderItem: OrderItem = {
       ...selectedItem,
       quantity: numericQuantity,
-      price: basePrice
+      price: basePrice,
+      comment: comments || undefined
     };
     addToOrder(orderItem);