添加了Mqtt服务器的连接，并添加了中文注释

ViewModels/DevicesViewModel.cs

@@ -53,7 +53,7 @@ public partial class DevicesViewModel : ViewModelBase
         _dataServices = dataServices;
 
         MessageHelper.SendLoadMessage(LoadTypes.Devices);
-        _dataServices.OnDeviceListChanged += (devices) => { Devices = new ObservableCollection<Device>(devices); };
+        _dataServices.OnDeviceListChanged += (sender, devices) => { Devices = new ObservableCollection<Device>(devices); };
     }
 
     /// <summary>

ViewModels/MainViewModel.cs

@@ -61,7 +61,7 @@ public partial class MainViewModel : ViewModelBase
         // 发送消息加载数据
         MessageHelper.SendLoadMessage(LoadTypes.All);
         // 当菜单加载成功后，在前台显示菜单
-        dataServices.OnMenuTreeListChanged += (menus) => { Menus = new ObservableCollection<MenuBean>(menus); };
+        dataServices.OnMenuTreeListChanged += (sender, menus) => { Menus = new ObservableCollection<MenuBean>(menus); };
     }
 
     /// <summary>

ViewModels/MqttsViewModel.cs

@@ -43,7 +43,7 @@ public partial class MqttsViewModel : ViewModelBase
         }
 
         
-        _dataServices.OnMqttListChanged += (mqtts) =>
+        _dataServices.OnMqttListChanged += (sender, mqtts) =>
         {
             Mqtts = new ObservableCollection<Mqtt>(mqtts);
         };