fix(api): normalize empty list responses

lib/api/orders.ts

@@ -5,7 +5,7 @@ import type { Order, OrderStatus } from "@/lib/types"
 import { httpJson } from "./http"
 
 type Paginated<T> = {
-  items: T[]
+  items: T[] | null
   meta: {
     total: number
     offset: number
@@ -59,7 +59,7 @@ export async function listOrders(options?: ListOrdersOptions): Promise<Order[]>
   const res = await httpJson<Paginated<Order>>(withOffsetLimit("/api/v1/orders", options), {
     cache: "no-store",
   })
-  return res.items
+  return res.items ?? []
 }
 
 export async function getOrderById(orderId: string): Promise<Order | undefined> {