完成门店管理后端接口与任务

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

@@ -0,0 +1,15 @@
+using MediatR;
+using TakeoutSaaS.Application.App.Stores.Dto;
+
+namespace TakeoutSaaS.Application.App.Stores.Queries;
+
+/// <summary>
+/// 获取门店费用配置查询。
+/// </summary>
+public sealed record GetStoreFeeQuery : IRequest<StoreFeeDto?>
+{
+    /// <summary>
+    /// 门店 ID。
+    /// </summary>
+    public long StoreId { get; init; }
+}