feat: 租户账单公告通知接口

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

@@ -0,0 +1,15 @@
+using MediatR;
+using TakeoutSaaS.Application.App.Tenants.Dto;
+
+namespace TakeoutSaaS.Application.App.Tenants.Commands;
+
+/// <summary>
+/// 标记租户账单已支付命令。
+/// </summary>
+public sealed record MarkTenantBillingPaidCommand : IRequest<TenantBillingDto?>
+{
+    public long TenantId { get; init; }
+    public long BillingId { get; init; }
+    public decimal AmountPaid { get; init; }
+    public DateTime PaidAt { get; init; } = DateTime.UtcNow;
+}