修改User模块，同步原始代码

Modules/Store.Users.Contracts/Dtos/UserTopUpRequests.cs

@@ -0,0 +1,21 @@
+using System.ComponentModel.DataAnnotations;
+namespace Store.Users.Contracts.Dtos;
+
+/// <summary>用户提交的充值备注。</summary>
+public sealed class UserTopUpMessageRequest
+{
+    [Required(ErrorMessage = "充值备注不能为空")] public string Message { get; set; } = "";
+}
+
+public sealed class UserTopUpResultRequest
+{
+    public long Id { get; set; }
+    [Required(ErrorMessage = "处理结果不能为空")] public string Result { get; set; } = "";
+}
+
+/// <summary>充值二维码；长度与 Base64 格式在服务中检查。</summary>
+public sealed class UserTopUpQrcodeRequest
+{
+    [Required(ErrorMessage = "代理编码不能为空")] public string AgentCode { get; set; } = "";
+    [Required(ErrorMessage = "二维码不能为空")] public string QrcodeBase64 { get; set; } = "";
+}