fix(qs): show power menu only on the focused screen

A PowerMenu window exists per screen and every one of them lit up on
open. Latch the focused monitor in Actions at open time — same shape as
launcherScreen — and gate each window's open state on it, so exactly one
copy draws and takes keyboard focus.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

quickshell/overlays/PowerMenu.qml

@@ -13,11 +13,16 @@ PanelWindow {
     required property var modelData
     screen: modelData
 
-    visible: Actions.powerMenuOpen || closeAnim.running
+    // Only the screen that had focus when the menu was asked for shows it; the
+    // other copies stay dormant so the keyboard has one place to land.
+    readonly property bool open: Actions.powerMenuOpen
+        && Actions.powerMenuScreen === modelData.name
+
+    visible: root.open || closeAnim.running
 
     WlrLayershell.layer: WlrLayer.Overlay
     WlrLayershell.namespace: "takemi-power"
-    WlrLayershell.keyboardFocus: Actions.powerMenuOpen
+    WlrLayershell.keyboardFocus: root.open
         ? WlrKeyboardFocus.Exclusive
         : WlrKeyboardFocus.None
 
@@ -25,7 +30,6 @@ PanelWindow {
     color: "transparent"
     exclusionMode: ExclusionMode.Ignore
 
-    readonly property bool open: Actions.powerMenuOpen
     property int selectedAction: 0
 
     function focusSelectedAction(): void {

quickshell/services/Actions.qml

@@ -29,9 +29,16 @@ Singleton {
     // keyboard focus and because a window should not hop mid-query.
     property string launcherScreen: ""
 
+    // Same story for the power menu: a window per screen, one of them wanted.
+    property string powerMenuScreen: ""
+
     signal osdRequested(string kind)
 
-    function togglePowerMenu() { root.powerMenuOpen = !root.powerMenuOpen; }
+    function togglePowerMenu() {
+        if (!root.powerMenuOpen)
+            root.powerMenuScreen = root.focusedScreenName();
+        root.powerMenuOpen = !root.powerMenuOpen;
+    }
     function closePowerMenu() { root.powerMenuOpen = false; }
     function lock() { root.powerMenuOpen = false; root.lockRequested = true; }