Add used-product flag for store listings.

Merchants can mark items as used on create/edit, see a used badge on cards, and filter the store list for used products.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/business/src/services/storeItemService.ts

@@ -26,6 +26,7 @@ export interface StoreItem {
   stockQuantity: number | null
   rewardPoints: number | null
   isFestival: boolean
+  isUsed: boolean
   sortOrder: number
   createdAt: string
   updatedAt: string
@@ -48,6 +49,7 @@ export interface CreateStoreItemPayload {
 
 export interface BatchCreateStoreItemsPayload {
   productId: string
+  isUsed?: boolean
   items: CreateStoreItemPayload[]
 }
 
@@ -74,6 +76,7 @@ export interface SyncStoreItemRowPayload {
 
 export interface SyncProductStoreItemsPayload {
   productId: string
+  isUsed?: boolean
   items: SyncStoreItemRowPayload[]
   removedIds: string[]
 }
@@ -95,7 +98,7 @@ export async function listStoreItems(
   page = 1,
   pageSize = 20,
   signal?: AbortSignal,
-  filters?: { name?: string },
+  filters?: { name?: string; isUsed?: boolean },
 ) {
   const params = new URLSearchParams({
     page: String(page),
@@ -104,6 +107,9 @@ export async function listStoreItems(
   if (filters?.name?.trim()) {
     params.set('name', filters.name.trim())
   }
+  if (filters?.isUsed) {
+    params.set('isUsed', 'true')
+  }
 
   return apiRequest<StoreItemsListResponse>(
     `${businessPath()}?${params.toString()}`,