volume mixer list placeholder

.config/quickshell/modules/sidebarRight/volumeMixer/VolumeMixer.qml

@@ -49,4 +49,38 @@ Item {
             }
         }
     }
+
+    // Placeholder when list is empty
+    Item {
+        anchors.fill: flickable
+
+        visible: opacity > 0
+        opacity: (linkTracker.linkGroups.length === 0) ? 1 : 0
+
+        Behavior on opacity {
+            NumberAnimation {
+                duration: Appearance.animation.menuDecel.duration
+                easing.type: Appearance.animation.menuDecel.type
+            }
+        }
+
+        ColumnLayout {
+            anchors.centerIn: parent
+            spacing: 5
+
+            MaterialSymbol {
+                Layout.alignment: Qt.AlignHCenter
+                font.pixelSize: 55
+                color: Appearance.m3colors.m3outline
+                text: "brand_awareness"
+            }
+            StyledText {
+                Layout.alignment: Qt.AlignHCenter
+                font.pixelSize: Appearance.font.pixelSize.normal
+                color: Appearance.m3colors.m3outline
+                horizontalAlignment: Text.AlignHCenter
+                text: "No audio source"
+            }
+        }
+    }
 }