Make every settings row reachable, and every accessibility switch honest

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

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

@@ -18,9 +18,33 @@ Item {
     property bool activatable: false
     signal activated
 
+    // Keyboard and screen-reader reach, added without changing a single thing
+    // about how the row looks or behaves under the pointer.
+    //
+    // Only an activatable row becomes a Tab stop. A row that does nothing when
+    // clicked must not collect focus either -- Tab landing on inert text is how
+    // keyboard navigation stops being usable long before it stops working.
+    function activate(): void {
+        if (root.activatable)
+            root.activated();
+    }
+
     width: parent ? parent.width : 620
     implicitHeight: Math.max(56, copy.implicitHeight + 20)
 
+    activeFocusOnTab: root.activatable
+
+    Accessible.role: root.activatable ? Accessible.Button : Accessible.StaticText
+    Accessible.name: root.label
+    Accessible.description: root.detail
+    Accessible.focusable: root.activatable
+    Accessible.focused: root.activeFocus
+    Accessible.onPressAction: root.activate()
+
+    Keys.onReturnPressed: root.activate()
+    Keys.onEnterPressed: root.activate()
+    Keys.onSpacePressed: root.activate()
+
     Text {
         id: iconLabel
         anchors.left: parent.left
@@ -104,6 +128,20 @@ Item {
         border.width: 0
     }
 
+    // The focus ring: the hover plate's geometry with a border added, so a row
+    // reached by Tab reads as the same target the pointer would have hit. Drawn
+    // only while this row holds keyboard focus, so nothing changes at rest.
+    Rectangle {
+        anchors.fill: parent
+        anchors.bottomMargin: 1
+        radius: 8
+        z: -1
+        visible: root.activatable && root.activeFocus
+        color: Theme.alpha(Theme.fg, 0.05)
+        border.width: 2
+        border.color: Theme.accentSecondary
+    }
+
     HoverHandler {
         id: rowHover
         enabled: root.activatable