Revert "refactor: 清理租户API旧模块代码"

This reverts commit 992930a821.

src/Application/TakeoutSaaS.Application/App/Payments/Handlers/DeletePaymentCommandHandler.cs

@@ -0,0 +1,38 @@
+using MediatR;
+using Microsoft.Extensions.Logging;
+using TakeoutSaaS.Application.App.Payments.Commands;
+using TakeoutSaaS.Domain.Payments.Repositories;
+using TakeoutSaaS.Shared.Abstractions.Tenancy;
+
+namespace TakeoutSaaS.Application.App.Payments.Handlers;
+
+/// <summary>
+/// 删除支付记录命令处理器。
+/// </summary>
+public sealed class DeletePaymentCommandHandler(
+    IPaymentRepository paymentRepository,
+    ITenantProvider tenantProvider,
+    ILogger<DeletePaymentCommandHandler> logger)
+    : IRequestHandler<DeletePaymentCommand, bool>
+{
+    private readonly IPaymentRepository _paymentRepository = paymentRepository;
+    private readonly ITenantProvider _tenantProvider = tenantProvider;
+    private readonly ILogger<DeletePaymentCommandHandler> _logger = logger;
+
+    /// <inheritdoc />
+    public async Task<bool> Handle(DeletePaymentCommand request, CancellationToken cancellationToken)
+    {
+        var tenantId = _tenantProvider.GetCurrentTenantId();
+        var existing = await _paymentRepository.FindByIdAsync(request.PaymentId, tenantId, cancellationToken);
+        if (existing == null)
+        {
+            return false;
+        }
+
+        await _paymentRepository.DeletePaymentAsync(request.PaymentId, tenantId, cancellationToken);
+        await _paymentRepository.SaveChangesAsync(cancellationToken);
+        _logger.LogInformation("删除支付记录 {PaymentId}", request.PaymentId);
+
+        return true;
+    }
+}