Make every settings row reachable, and every accessibility switch honest

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

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

@@ -50,6 +50,17 @@ Column {
         controlWidth: 210
         onActivated: root.expanded = !root.expanded
 
+        // The collapsed row is already a Tab stop and already activates on
+        // Space through SettingRow; what it cannot say for itself is that it
+        // opens a list, and which value that list is currently sitting on.
+        activeFocusOnTab: root.enabled
+
+        Accessible.role: Accessible.ComboBox
+        Accessible.name: root.label
+        Accessible.description: root.detail === ""
+            ? root.value
+            : `${root.detail} — ${root.value}`
+
         Row {
             anchors.right: parent.right
             anchors.verticalCenter: parent.verticalCenter