修改User模块

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

@@ -1,15 +1,23 @@
 using System.ComponentModel.DataAnnotations;
 namespace Store.Users.Contracts.Dtos;
 
-/// <summary>资金请求；DTO 只声明非空规则，金额、长度和操作规则由服务判断。</summary>
-public sealed class UserFundsRequest
+/// <summary>资金请求；DTO 检查输入，服务区分积分/余额操作并校验权限。</summary>
+public sealed class UserFundsRequest : IValidatableObject
 {
-    [Required(ErrorMessage = "目标账户不能为空")] public string UserName { get; set; } = "";
-    [Required(ErrorMessage = "请求号不能为空")] public string RequestId { get; set; } = "";
+    [Required(ErrorMessage = "目标账户不能为空"), StringLength(20)] public string UserName { get; set; } = "";
+    [Required(ErrorMessage = "请求号不能为空"), StringLength(64)] public string RequestId { get; set; } = "";
+    [Range(typeof(decimal), "0.01", "1000000")]
     public decimal Amount { get; set; }
     /// <summary>积分支持充值、转移；余额支持充值、消费。</summary>
-    [Required(ErrorMessage = "操作类型不能为空")] public string Operation { get; set; } = "";
+    [Required(ErrorMessage = "操作类型不能为空"), StringLength(20)] public string Operation { get; set; } = "";
+    [StringLength(255)]
     public string? Remark { get; set; }
+
+    public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
+    {
+        if (decimal.Round(Amount, 2) != Amount)
+            yield return new ValidationResult("金额最多保留两位小数", [nameof(Amount)]);
+    }
 }
 
 public sealed record UserFundsResponse(string UserName, decimal Value, string RequestId);