chore: block vless toggle while active connection (#2318)

* fix: prevent disabled SwitcherType from toggling via keyboard

* fix: disabled vless option toggle while connection is active

client/ui/qml/Controls2/SwitcherType.qml

@@ -153,7 +153,7 @@ Switch {
     Keys.onSpacePressed: event => handleSwitch(event)
 
     function handleSwitch(event) {
-        if (!event.isAutoRepeat) {
+        if (root.enabled && !event.isAutoRepeat) {
             root.checked = !root.checked
             root.toggled()
         }

client/ui/qml/Pages2/PageSettingsApiServerInfo.qml

@@ -259,6 +259,7 @@ PageType {
                 id: switcher
 
                 readonly property bool isVlessProtocol: ApiConfigsController.isVlessProtocol()
+                readonly property bool isProtocolSwitchBlocked: ServersModel.isDefaultServerCurrentlyProcessed() && ConnectionController.isConnected
 
                 Layout.fillWidth: true
                 Layout.topMargin: 24
@@ -266,6 +267,7 @@ PageType {
                 Layout.leftMargin: 16
 
                 visible: ApiAccountInfoModel.data("isProtocolSelectionSupported")
+                enabled: !switcher.isProtocolSwitchBlocked
 
                 text: qsTr("Use VLESS protocol")
                 checked: switcher.isVlessProtocol