修改退出时关闭所有服务和连接

DMS.Infrastructure/Interfaces/Services/IMqttBackgroundService.cs

@@ -9,7 +9,7 @@ namespace DMS.Infrastructure.Interfaces.Services
     /// <summary>
     /// MQTT后台服务接口，负责管理MQTT连接和数据传输
     /// </summary>
-    public interface IMqttBackgroundService
+    public interface IMqttBackgroundService : IDisposable
     {
         /// <summary>
         /// 启动MQTT后台服务

DMS.Infrastructure/Interfaces/Services/IMqttServiceManager.cs

@@ -9,7 +9,7 @@ namespace DMS.Infrastructure.Interfaces.Services
     /// <summary>
     /// MQTT服务管理器接口，负责管理MQTT连接和变量监控
     /// </summary>
-    public interface IMqttServiceManager
+    public interface IMqttServiceManager : IDisposable
     {
         /// <summary>
         /// 初始化服务管理器

DMS.Infrastructure/Services/MqttBackgroundService.cs

@@ -243,5 +243,20 @@ namespace DMS.Infrastructure.Services
             _logger.LogInformation("MQTT列表发生了变化，正在重新加载数据...");
             _reloadSemaphore.Release();
         }
+
+        /// <summary>
+        /// 释放资源
+        /// </summary>
+        public override void Dispose()
+        {
+            _logger.LogInformation("正在释放MQTT后台服务资源...");
+            
+            _dataCenterService.OnLoadDataCompleted -= OnLoadDataCompleted;
+            _reloadSemaphore?.Dispose();
+            
+            base.Dispose();
+            
+            _logger.LogInformation("MQTT后台服务资源已释放");
+        }
     }
 }