Draw idle as one timeline, and let the power button answer to its owner

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

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

@@ -5,22 +5,50 @@
 // ones and falls apart at four with sentences under them -- and on this page
 // two cards sit side by side, so a row has half the width it used to.
 //
-// Not schema-bound. Some of these choices are Panama settings and some are
-// display state that has to go through a keep-or-revert transaction, so the
-// caller says what to do with the value rather than this writing it.
+// Schema-bound when you name a key, hand-fed when you do not:
+//
+//   OptionPickerRow { setting: "powerButtonAction" }
+//
+// gets its label, explanation, option list and current value from
+// PreferenceSchema and commits the pick for you, exactly as ToggleRow and
+// ChoiceRow do. Leaving `setting` empty keeps the original behavior, which is
+// what the display rows need: some of these choices are not preferences at all
+// but compositor state going through a keep-or-revert transaction, so the
+// caller says what a pick means rather than this writing it.
 
 import QtQuick
 import qs.config
+import qs.services
 
 PickerRow {
     id: root
 
+    // Empty means "not a stored preference"; see above.
+    property string setting: ""
+
+    readonly property var spec:
+        root.setting === "" ? null : PreferenceSchema.spec(root.setting)
+
     // [{ value, label, detail }]
-    property var options: []
-    property var current: null
+    property var options: root.spec && root.spec.options ? root.spec.options : []
+    property var current: root.setting === "" ? null : DesktopPreferences.get(root.setting)
+
+    label: root.spec ? root.spec.label : ""
+    detail: root.spec ? root.spec.detail : ""
 
     signal picked(var value)
 
+    // Connected rather than handled inline: a caller that declares its own
+    // `onPicked` replaces a handler written in this file, and a schema-bound
+    // row that silently stopped writing would be a bad way to find that out.
+    Connections {
+        target: root
+        function onPicked(value: var): void {
+            if (root.setting !== "")
+                SystemSettings.commitPreference(root.setting, value);
+        }
+    }
+
     readonly property var currentOption:
         root.options.find(option => option.value === root.current) ?? null