feat(sound): show the active device name in the volume OSD

The OSD showed only "Output"/"Input", not which device was in use, so
switching between, say, the analogue output and a USB DAC gave no
visible confirmation beyond the volume itself.

The name falls back description -> nickname -> name, the same order
SoundPage.devLabel uses, and elides. The panel height grows to fit the
new line.

1 files changed, 12 insertions, 2 deletions

diff --git a/desktop/modules/sound/Osd.qml b/desktop/modules/sound/Osd.qml
index 424b9c3..49a977b 100644
--- a/desktop/modules/sound/Osd.qml
+++ b/desktop/modules/sound/Osd.qml
@@ -60,9 +60,9 @@ Scope {
         anchors.bottom: true
         margins.bottom: 120
 
-        // Grows to fit the track row; the volume-only size is unchanged.
+        // Grows to fit the track row and the device line.
         implicitWidth: 360
-        implicitHeight: Player.active ? 150 : 72
+        implicitHeight: Player.active ? 178 : 100
         color: "transparent"
 
         exclusionMode: ExclusionMode.Ignore
@@ -165,6 +165,16 @@ Scope {
                                 Behavior on width { NumberAnimation { duration: 100 } }
                             }
                         }
+
+                        // The device the active node represents. Same fallback
+                        // order as SoundPage.devLabel.
+                        Text {
+                            width: parent.width
+                            elide: Text.ElideRight
+                            text: win.node?.description || win.node?.nickname || win.node?.name || ""
+                            font { family: Theme.fontFamily; pixelSize: Theme.fontSize - 2 }
+                            color: Theme.subtext
+                        }
                     }
                 }
             }