完成门店管理后端接口与任务

src/Application/TakeoutSaaS.Application/App/Stores/Commands/ToggleBusinessStatusCommand.cs

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+using MediatR;
+using TakeoutSaaS.Application.App.Stores.Dto;
+using TakeoutSaaS.Domain.Stores.Enums;
+
+namespace TakeoutSaaS.Application.App.Stores.Commands;
+
+/// <summary>
+/// 切换门店经营状态命令。
+/// </summary>
+public sealed record ToggleBusinessStatusCommand : IRequest<StoreDto>
+{
+    /// <summary>
+    /// 门店 ID。
+    /// </summary>
+    public long StoreId { get; init; }
+
+    /// <summary>
+    /// 目标经营状态。
+    /// </summary>
+    public StoreBusinessStatus BusinessStatus { get; init; }
+
+    /// <summary>
+    /// 歇业原因。
+    /// </summary>
+    public StoreClosureReason? ClosureReason { get; init; }
+
+    /// <summary>
+    /// 歇业原因补充说明。
+    /// </summary>
+    public string? ClosureReasonText { get; init; }
+}