fix: swallow first pipewire/backlight value to prevent osd on startup

modules/Volume.qml

@@ -39,16 +39,25 @@ M.BarSection {
     }
 
     property bool _osdActive: false
-    property bool _ready: false
+    property bool _volumeInit: false
+    property bool _mutedInit: false
     readonly property bool _anyHover: root._hovered || hoverPanel.panelHovered
     readonly property bool _showPanel: _anyHover || _osdActive
 
-    Component.onCompleted: _ready = true
-
-    onVolumeChanged: if (_ready)
-        _flashPanel()
-    onMutedChanged: if (_ready)
-        _flashPanel()
+    onVolumeChanged: {
+        if (!_volumeInit) {
+            _volumeInit = true;
+            return;
+        }
+        _flashPanel();
+    }
+    onMutedChanged: {
+        if (!_mutedInit) {
+            _mutedInit = true;
+            return;
+        }
+        _flashPanel();
+    }
 
     function _flashPanel() {
         _osdActive = true;