feat: add desktop notifications and skills updates

src/components/settings/hooks/useSettingsController.ts

@@ -110,6 +110,7 @@ const createDefaultNotificationPreferences = (): NotificationPreferencesState =>
   channels: {
     inApp: true,
     webPush: false,
+    desktop: false,
     sound: true,
   },
   events: {
@@ -128,6 +129,7 @@ const normalizeNotificationPreferences = (
     channels: {
       inApp: preferences?.channels?.inApp ?? defaults.channels.inApp,
       webPush: preferences?.channels?.webPush ?? defaults.channels.webPush,
+      desktop: preferences?.channels?.desktop ?? defaults.channels.desktop,
       sound: preferences?.channels?.sound ?? defaults.channels.sound,
     },
     events: {