play volume feedback when changing volume externally

Services/Media/AudioService.qml

@@ -14,6 +14,10 @@ Singleton {
   property var lastVolumeFeedbackTime: 0
   readonly property int minVolumeFeedbackInterval: 100
 
+  // Track the last sink that produced volume feedback so we can suppress the
+  // initial onVolumeChanged that fires on startup and device switches.
+  property PwNode _lastFeedbackSink: null
+
   // Devices
   readonly property PwNode sink: Pipewire.ready ? Pipewire.defaultAudioSink : null
   readonly property PwNode source: validatedSource
@@ -502,6 +506,12 @@ Singleton {
         return;
       }
 
+      if (root.sink !== root._lastFeedbackSink) {
+        root._lastFeedbackSink = root.sink;
+      } else {
+        playVolumeFeedback(clampOutputVolume(vol));
+      }
+
       // If volume exceeds max, clamp it (but only if we didn't just set it)
       if (vol > root.maxVolume) {
         root.isSettingOutputVolume = true;