Span the power widget's open-panel mark across the percentage block

The widget declared no indicator hint, so the mark fell back to 55% of
the slot — sized for a lone icon, too short once the percentage doubles
the block. Hint the glyph's painted width, the way the clock hints its
label width.

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

shell/Ui/BarIconButton.qml

@@ -10,6 +10,7 @@ WidgetButton {
   property real opticalSize: Style.bar.iconCanvas
   property bool debugOpticalBounds: Quickshell.env("OMARCHY_DEBUG_BAR_ICONS") === "1"
   readonly property real opticalCenterErrorX: glyph.visible ? glyph.paintedCenterX - opticalCanvas.width / 2 : 0
+  readonly property real glyphPaintedWidth: glyph.visible ? glyph.tightWidth : 0
   readonly property real glyphBaselineY: glyph.visible ? glyph.baselineY : 0
   readonly property int glyphFontSize: glyph.visible ? glyph.renderedFontSize : 0
 

shell/plugins/panels/power/Panel.qml

@@ -17,6 +17,10 @@ Panel {
   property int profileIndex: 0
   property bool cursorActive: false
   readonly property bool showPercentage: setting("showPercentage", false) === true
+  // With the percentage shown the button paints a text block wider than an
+  // icon, so the open-panel mark takes the painted width instead of the
+  // icon-sized fraction of the slot the fallback assumes.
+  readonly property real openPanelIndicatorWidth: showPercentage && !button.vertical ? button.glyphPaintedWidth : 0
   readonly property bool batteryPresent: {
     var device = UPower.displayDevice
     return !!(device && device.isPresent)

test/shell.d/power-test.sh

@@ -45,4 +45,5 @@ assertEqual(
 assert(/if \(b === Qt\.RightButton\) root\.togglePercentage\(\)/.test(panelSource), 'power right click toggles the bar percentage')
 assert(/Object\.assign\([^\n]+showPercentage: !root\.showPercentage[^\n]+\)[\s\S]*updateEntryInline/.test(panelSource), 'power persists the bar percentage setting')
 assert(/Math\.round\(root\.batteryFraction \* 100\) \+ "% " \+ root\.batteryIcon\(\)/.test(panelSource), 'power places the percentage before the battery icon')
+assert(/openPanelIndicatorWidth:.*showPercentage.*button\.glyphPaintedWidth : 0/.test(panelSource), 'power spans the open-panel mark across the painted percentage block')
 JS