feat: 关闭模拟器后重置连接状态，减少无意义重连尝试

src/MaaWpfGui/Main/AsstProxy.cs

@@ -427,6 +427,13 @@ namespace MaaWpfGui.Main
         }
 
         private bool connected = false;
+
+        public bool Connected
+        {
+            get => connected;
+            set => connected = value;
+        }
+
         private string connectedAdb;
         private string connectedAddress;
 

src/MaaWpfGui/ViewModels/UI/TaskQueueViewModel.cs

@@ -1070,6 +1070,7 @@ namespace MaaWpfGui.ViewModels.UI
         public bool KillEmulatorModeSwitcher()
         {
             string emulatorMode = Instances.SettingsViewModel.ConnectConfig;
+            Instances.AsstProxy.Connected = false;
             return emulatorMode switch
             {
                 "Nox" => KillEmulatorNox(),