按照软件设计文档开始重构代码01

DMS.Application/DTOs/MqttServerDto.cs

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+using System;
+
+namespace DMS.Application.DTOs;
+
+/// <summary>
+/// 用于在UI上显示MQTT服务器配置信息的DTO。
+/// </summary>
+public class MqttServerDto
+{
+    public int Id { get; set; }
+    public string ServerName { get; set; }
+    public string BrokerAddress { get; set; }
+    public int Port { get; set; }
+    public string Username { get; set; }
+    public string Password { get; set; }
+    public bool IsActive { get; set; }
+    public string SubscribeTopic { get; set; }
+    public string PublishTopic { get; set; }
+    public string ClientId { get; set; }
+    public DateTime CreatedAt { get; set; }
+    public DateTime? ConnectedAt { get; set; }
+    public long ConnectionDuration { get; set; }
+    public string MessageFormat { get; set; }
+}