feat(MED-122): fix error in case of cart without shipping

packages/features/medusa-storefront/src/modules/order/components/shipping-details/index.tsx

@@ -9,6 +9,10 @@ type ShippingDetailsProps = {
 }
 
 const ShippingDetails = ({ order }: ShippingDetailsProps) => {
+  if (!order.shipping_methods || order.shipping_methods.length === 0) {
+    return null;
+  }
+
   return (
     <div>
       <Heading level="h2" className="flex flex-row text-3xl-regular my-6">
@@ -58,7 +62,7 @@ const ShippingDetails = ({ order }: ShippingDetailsProps) => {
           <Text className="txt-medium text-ui-fg-subtle">
             {(order as any).shipping_methods[0]?.name} (
             {convertToLocale({
-              amount: order.shipping_methods?.[0].total ?? 0,
+              amount: order.shipping_methods?.[0]?.total ?? 0,
               currency_code: order.currency_code,
             })
               .replace(/,/g, "")