feat: 列表接口分页排序与验证

src/Application/TakeoutSaaS.Application/App/Orders/Handlers/SearchOrdersQueryHandler.cs

@@ -2,6 +2,7 @@ using MediatR;
 using TakeoutSaaS.Application.App.Orders.Dto;
 using TakeoutSaaS.Application.App.Orders.Queries;
 using TakeoutSaaS.Domain.Orders.Repositories;
+using TakeoutSaaS.Shared.Abstractions.Results;
 using TakeoutSaaS.Shared.Abstractions.Tenancy;
 
 namespace TakeoutSaaS.Application.App.Orders.Handlers;
@@ -12,13 +13,13 @@ namespace TakeoutSaaS.Application.App.Orders.Handlers;
 public sealed class SearchOrdersQueryHandler(
     IOrderRepository orderRepository,
     ITenantProvider tenantProvider)
-    : IRequestHandler<SearchOrdersQuery, IReadOnlyList<OrderDto>>
+    : IRequestHandler<SearchOrdersQuery, PagedResult<OrderDto>>
 {
     private readonly IOrderRepository _orderRepository = orderRepository;
     private readonly ITenantProvider _tenantProvider = tenantProvider;
 
     /// <inheritdoc />
-    public async Task<IReadOnlyList<OrderDto>> Handle(SearchOrdersQuery request, CancellationToken cancellationToken)
+    public async Task<PagedResult<OrderDto>> Handle(SearchOrdersQuery request, CancellationToken cancellationToken)
     {
         var tenantId = _tenantProvider.GetCurrentTenantId();
         var orders = await _orderRepository.SearchAsync(tenantId, request.Status, request.PaymentStatus, cancellationToken);
@@ -42,7 +43,7 @@ public sealed class SearchOrdersQueryHandler(
             .Take(request.PageSize)
             .ToList();
 
-        return paged.Select(order => new OrderDto
+        var items = paged.Select(order => new OrderDto
         {
             Id = order.Id,
             TenantId = order.TenantId,
@@ -68,6 +69,8 @@ public sealed class SearchOrdersQueryHandler(
             Remark = order.Remark,
             CreatedAt = order.CreatedAt
         }).ToList();
+
+        return new PagedResult<OrderDto>(items, request.Page, request.PageSize, orders.Count);
     }
 
     private static IOrderedEnumerable<Domain.Orders.Entities.Order> ApplySorting(

src/Application/TakeoutSaaS.Application/App/Orders/Queries/SearchOrdersQuery.cs

@@ -2,13 +2,14 @@ using MediatR;
 using TakeoutSaaS.Application.App.Orders.Dto;
 using TakeoutSaaS.Domain.Orders.Enums;
 using TakeoutSaaS.Domain.Payments.Enums;
+using TakeoutSaaS.Shared.Abstractions.Results;
 
 namespace TakeoutSaaS.Application.App.Orders.Queries;
 
 /// <summary>
 /// 订单列表查询。
 /// </summary>
-public sealed class SearchOrdersQuery : IRequest<IReadOnlyList<OrderDto>>
+public sealed class SearchOrdersQuery : IRequest<PagedResult<OrderDto>>
 {
     /// <summary>
     /// 门店 ID（可选）。