feat: 管理端核心实体CRUD补齐

src/Application/TakeoutSaaS.Application/App/Stores/Queries/SearchStoresQuery.cs

@@ -0,0 +1,21 @@
+using MediatR;
+using TakeoutSaaS.Application.App.Stores.Dto;
+using TakeoutSaaS.Domain.Stores.Enums;
+
+namespace TakeoutSaaS.Application.App.Stores.Queries;
+
+/// <summary>
+/// 门店列表查询。
+/// </summary>
+public sealed class SearchStoresQuery : IRequest<IReadOnlyList<StoreDto>>
+{
+    /// <summary>
+    /// 商户 ID（可选）。
+    /// </summary>
+    public long? MerchantId { get; init; }
+
+    /// <summary>
+    /// 状态过滤。
+    /// </summary>
+    public StoreStatus? Status { get; init; }
+}