Give Sound the whole story, and keep the buttons inside the card

Claude-Session: https://claude.ai/code/session_01Ms2FbjQy31TVf3CEvQhGM8

config/dot/quickshell/modules/settings/SoundDeviceList.qml

@@ -1,3 +1,12 @@
+// The devices of one direction, as a list you choose from.
+//
+// The list tells the whole story, which means it also has to account for the
+// device that is not here: a session whose default is a pair of AirPods in
+// their case used to show no trace of them, so the output that audio will
+// return to the moment they connect looked like something Panama had
+// forgotten. SoundDefaults knows the configured name, and a configured name
+// with no node behind it renders last, dimmed and inert -- a ghost row.
+
 import QtQuick
 import Quickshell.Services.Pipewire
 import qs.config
@@ -10,8 +19,14 @@ Column {
     readonly property var nodes: AudioDevices.nodes(root.output)
     readonly property var current: AudioDevices.current(root.output)
 
+    // { name, label } for the configured default that is not present, or null
+    // when everything the session chose is here. The service owns both the
+    // comparison and the naming: an absent device has no description to borrow,
+    // and its stored name is all there is to read it from.
+    readonly property var absent: SoundDefaults.absent(root.output)
+
     width: parent ? parent.width : 620
-    spacing: 8
+    spacing: 0
 
     Repeater {
         model: root.nodes
@@ -26,9 +41,17 @@ Column {
         }
     }
 
+    SoundDeviceRow {
+        width: root.width
+        visible: !!root.absent
+        output: root.output
+        ghost: true
+        ghostLabel: root.absent ? String(root.absent.label) : ""
+    }
+
     Text {
         width: parent.width
-        visible: root.nodes.length === 0
+        visible: root.nodes.length === 0 && !root.absent
         text: Pipewire.ready ? "No audio devices found" : "Discovering audio devices…"
         color: Theme.fgDim
         font.family: Theme.fontFamily