feat: add notification sound and notification window enhancements. Ready for alpha.NotificationBody needs work

modules/bar/states/Audio/DefaultSourceState.qml

@@ -7,20 +7,20 @@ import Quickshell.Services.Pipewire
 Item {
     id: root
 
-    PwObjectTracker {
-        objects: [ Pipewire.defaultAudioSource ]
-    }
-
     property var audioSource: Pipewire.defaultAudioSource
 
-    property bool exists: audioSource != null
+    property bool exists: audioSource != null && audioSource.ready
     property bool mute: audioSource?.audio?.muted ?? false
     property real volume: Math.round((audioSource?.audio?.volume ?? 0) * 1000) / 10
 
     property bool volumeChanged: false
 
+    PwObjectTracker {
+        objects: [ root.audioSource ]
+    }
+
 	Connections {
-		target: audioSource?.audio
+		target: root.audioSource?.audio
 
 		function onVolumeChanged() {
 			root.volumeChanged = true;