修改User模块，同步原始代码

Modules/Store.Users/Dtos/ShopRenewRequest.cs

@@ -1,27 +1,11 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
+using System.ComponentModel.DataAnnotations;
+namespace Store.Users.Dtos;
 
-namespace Store.Users.Dtos
+/// <summary>续费请求；仅声明店铺ID非空，时长和长度由服务或命令处理。</summary>
+public class ShopRenewRequest
 {
-	/// <summary>
-	/// 用户续费商铺
-	/// </summary>
-	public class ShopRenewRequest 
-	{
-		/// <summary>
-		/// 店铺ID
-		/// </summary>
-		public string ShopId { get; set; }
-
-		/// <summary>
-		/// 续费时长数值，例如 3；范围 1-120 个月
-		/// </summary>
-		public int RenewDuration { get; set; }
-
-		/// <summary>
-		/// 备注
-		/// </summary>
-		public string Remark { get; set; }
-	}
+    [Required(ErrorMessage = "店铺ID不能为空")] public string ShopId { get; set; } = "";
+    /// <summary>续费时长，单位月，合法范围1-120。</summary>
+    public int RenewDuration { get; set; }
+    public string? Remark { get; set; }
 }