fix(xhs): task/report 与 task/cancel 返回 JSON 响应

避免 Agent 客户端解析空 body 报「非 JSON 响应」导致任务上报失败。

Co-authored-by: Cursor <cursoragent@cursor.com>

src/Oms.Application/Dtos/Xhs/XhsDtos.cs

@@ -136,6 +136,11 @@ public class XhsTaskReportInput
     public string? ErrorMessage { get; set; }
 }
 
+public class XhsTaskReportOutput
+{
+    public bool Ok { get; set; } = true;
+}
+
 public class XhsTaskListInput : XhsPageInput
 {
     public string? Status { get; set; }

src/Oms.Application/Services/Xhs/XhsTaskService.cs

@@ -43,7 +43,7 @@ public class XhsTaskService : ApplicationService
     }
 
     [HttpPost("/xhs/task/report")]
-    public async Task ReportAsync(XhsTaskReportInput input)
+    public async Task<XhsTaskReportOutput> ReportAsync(XhsTaskReportInput input)
     {
         var customerId = await OmsSessionHelper.ResolveXhsCustomerIdAsync(CustomerRepository, CurrentUser);
         var task = await TaskRepository.FirstOrDefaultAsync(x => x.Id == input.TaskId);
@@ -80,6 +80,7 @@ public class XhsTaskService : ApplicationService
         await TaskRepository.UpdateAsync(task);
         await SyncPublishRecordAsync(task, status, input);
         await SyncAnalysisSessionAsync(task, status, input);
+        return new XhsTaskReportOutput();
     }
 
     [HttpPost("/xhs/task/list")]
@@ -104,7 +105,7 @@ public class XhsTaskService : ApplicationService
     }
 
     [HttpPost("/xhs/task/cancel")]
-    public async Task CancelAsync(XhsTaskCancelInput input)
+    public async Task<XhsTaskReportOutput> CancelAsync(XhsTaskCancelInput input)
     {
         var customerId = await OmsSessionHelper.ResolveXhsCustomerIdAsync(CustomerRepository, CurrentUser);
         var task = await TaskRepository.FirstOrDefaultAsync(x => x.Id == input.TaskId);
@@ -121,6 +122,7 @@ public class XhsTaskService : ApplicationService
         task.Status = XhsTaskStatusCodes.Cancelled;
         task.FinishedAt = DateTime.Now;
         await TaskRepository.UpdateAsync(task);
+        return new XhsTaskReportOutput();
     }
 
     private async Task SyncAnalysisSessionAsync(XhsTask task, string status, XhsTaskReportInput input)