feat: 租户账单公告通知接口

src/Application/TakeoutSaaS.Application/App/Tenants/Commands/CreateTenantAnnouncementCommand.cs

@@ -0,0 +1,20 @@
+using MediatR;
+using TakeoutSaaS.Application.App.Tenants.Dto;
+using TakeoutSaaS.Domain.Tenants.Enums;
+
+namespace TakeoutSaaS.Application.App.Tenants.Commands;
+
+/// <summary>
+/// 创建租户公告命令。
+/// </summary>
+public sealed record CreateTenantAnnouncementCommand : IRequest<TenantAnnouncementDto>
+{
+    public long TenantId { get; init; }
+    public string Title { get; init; } = string.Empty;
+    public string Content { get; init; } = string.Empty;
+    public TenantAnnouncementType AnnouncementType { get; init; } = TenantAnnouncementType.System;
+    public int Priority { get; init; } = 0;
+    public DateTime EffectiveFrom { get; init; } = DateTime.UtcNow;
+    public DateTime? EffectiveTo { get; init; }
+    public bool IsActive { get; init; } = true;
+}