feat: add custom sound for notification so it works for Linux too

ts/test/types/Settings_test.ts

@@ -63,7 +63,7 @@ describe('Settings', () => {
       });
 
       it('should return true', () => {
-        assert.isFalse(Settings.isAudioNotificationSupported());
+        assert.isTrue(Settings.isAudioNotificationSupported());
       });
     });
   });

ts/types/Settings.ts

@@ -2,7 +2,8 @@ import * as OS from '../OS';
 
 const MIN_WINDOWS_VERSION = '8.0.0';
 
-export const isAudioNotificationSupported = () => OS.isWindows(MIN_WINDOWS_VERSION) || OS.isMacOS(); // currently, only linux does not support audio notification natively
+export const isAudioNotificationSupported = () =>
+  OS.isWindows(MIN_WINDOWS_VERSION) || OS.isMacOS() || OS.isLinux();
 
 // Using `Notification::tag` has a bug on Windows 7:
 // https://github.com/electron/electron/issues/11189

ts/util/notifications.ts

@@ -22,6 +22,8 @@ function filter(text?: string) {
     .replace(/>/g, '>');
 }
 
+let sound: any;
+
 export type SessionNotification = {
   conversationId: string;
   iconUrl: string | null;
@@ -218,10 +220,16 @@ function update(forceRefresh = false) {
   }
 
   window.drawAttention();
+  if (status.shouldPlayNotificationSound) {
+    if (!sound) {
+      sound = new Audio('sound/new_message.mp3');
+    }
+    void sound.play();
+  }
   lastNotificationDisplayed = new Notification(title || '', {
     body: window.platform === 'linux' ? filter(message) : message,
     icon: iconUrl || undefined,
-    silent: !status.shouldPlayNotificationSound,
+    silent: true,
   });
   lastNotificationDisplayed.onclick = () => {
     window.openFromNotification(lastNotification.conversationId);