fix(dashboard,js-sdk): fixes from rma flows testing (#8826)

packages/core/js-sdk/src/admin/order.ts

@@ -31,6 +31,7 @@ export class Order {
     return await this.client.fetch<HttpTypes.AdminOrderPreviewResponse>(
       `/admin/orders/${id}/preview`,
       {
+        query,
         headers,
       }
     )

packages/core/types/src/http/order/admin/entities.ts

@@ -14,6 +14,8 @@ export interface AdminOrder extends BaseOrder {
   fulfillments?: BaseOrderFulfillment[]
 }
 
+export interface AdminOrderLineItem extends BaseOrderLineItem {}
+
 export interface AdminOrderFulfillment extends BaseOrderFulfillment {}
 
 export interface AdminOrderLineItem extends BaseOrderLineItem {}