diff --git a/shell/Commons/Style.qml b/shell/Commons/Style.qml
index 88aa6a90..8854e052 100644
--- a/shell/Commons/Style.qml
+++ b/shell/Commons/Style.qml
@@ -341,6 +341,8 @@ QtObject {
   readonly property QtObject bar: QtObject {
     readonly property int sizeHorizontal: root.barToken("size-horizontal", 26)
     readonly property int sizeVertical:   root.barToken("size-vertical",   28)
+    readonly property int iconSlot:       root.barToken("icon-slot",       27)
+    readonly property int iconCanvas:     root.barToken("icon-canvas",     16)
   }
 
   function refresh() {
diff --git a/shell/Ui/BarIconButton.qml b/shell/Ui/BarIconButton.qml
new file mode 100644
index 00000000..21c4e94f
--- /dev/null
+++ b/shell/Ui/BarIconButton.qml
@@ -0,0 +1,60 @@
+import QtQuick
+import Quickshell
+import qs.Commons
+
+WidgetButton {
+  id: root
+
+  property Component iconComponent: null
+  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 opticalCenterErrorY: glyph.visible ? glyph.paintedCenterY - opticalCanvas.height / 2 : 0
+
+  labelVisible: false
+  hasVisualContent: text !== "" || iconComponent !== null
+  fontSize: Style.font.body
+  fixedWidth: vertical ? -1 : Style.bar.iconSlot
+  fixedHeight: vertical ? Style.bar.iconSlot : -1
+
+  Item {
+    id: opticalCanvas
+    anchors.centerIn: parent
+    width: root.opticalSize
+    height: root.opticalSize
+
+    OpticalGlyph {
+      id: glyph
+      anchors.fill: parent
+      visible: root.iconComponent === null
+      text: root.text
+      fontFamily: root.fontFamily
+      fontSize: root.fontSize
+      color: root.active && root.useActiveColor ? root.activeColor : root.foreground
+      rotation: root.textRotation
+      debugBounds: root.debugOpticalBounds
+    }
+
+    Loader {
+      anchors.fill: parent
+      visible: root.iconComponent !== null
+      sourceComponent: root.iconComponent
+    }
+
+    Rectangle {
+      visible: root.debugOpticalBounds && root.iconComponent !== null
+      anchors.fill: parent
+      color: "transparent"
+      border.width: 1
+      border.color: "#4488ff"
+    }
+  }
+
+  Rectangle {
+    visible: root.debugOpticalBounds
+    anchors.fill: parent
+    color: "transparent"
+    border.width: 1
+    border.color: "#ff4455"
+  }
+}
diff --git a/shell/Ui/OpticalGlyph.qml b/shell/Ui/OpticalGlyph.qml
new file mode 100644
index 00000000..0900d78d
--- /dev/null
+++ b/shell/Ui/OpticalGlyph.qml
@@ -0,0 +1,58 @@
+import QtQuick
+import qs.Commons
+
+Item {
+  id: root
+
+  property string text: ""
+  property string fontFamily: Style.font.family
+  property real fontSize: Style.font.body
+  property color color: Color.foreground
+  property real targetExtent: Math.min(width, height) * 0.82
+  property bool debugBounds: false
+
+  readonly property real baseTightWidth: Math.max(1, baseMetrics.tightBoundingRect.width)
+  readonly property real baseTightHeight: Math.max(1, baseMetrics.tightBoundingRect.height)
+  readonly property real normalizedScale: Math.min(1.5, targetExtent / Math.max(baseTightWidth, baseTightHeight))
+  readonly property int normalizedFontSize: Math.max(1, Math.round(fontSize * normalizedScale))
+  readonly property real tightWidth: Math.max(1, glyphMetrics.tightBoundingRect.width)
+  readonly property real tightHeight: Math.max(1, glyphMetrics.tightBoundingRect.height)
+  readonly property real horizontalCorrection: glyph.implicitWidth / 2 - (glyphMetrics.tightBoundingRect.x + tightWidth / 2)
+  readonly property real verticalCorrection: glyph.implicitHeight / 2 - (glyph.baselineOffset + glyphMetrics.tightBoundingRect.y + tightHeight / 2)
+  readonly property real paintedCenterX: glyph.x + glyphMetrics.tightBoundingRect.x + tightWidth / 2
+  readonly property real paintedCenterY: glyph.y + glyph.baselineOffset + glyphMetrics.tightBoundingRect.y + tightHeight / 2
+
+  TextMetrics {
+    id: baseMetrics
+    font.family: root.fontFamily
+    font.pixelSize: root.fontSize
+    text: root.text
+  }
+
+  TextMetrics {
+    id: glyphMetrics
+    font.family: root.fontFamily
+    font.pixelSize: root.normalizedFontSize
+    text: root.text
+  }
+
+  Text {
+    id: glyph
+    anchors.centerIn: parent
+    anchors.horizontalCenterOffset: root.horizontalCorrection
+    anchors.verticalCenterOffset: root.verticalCorrection
+    text: root.text
+    color: root.color
+    font.family: root.fontFamily
+    font.pixelSize: root.normalizedFontSize
+    renderType: Text.NativeRendering
+  }
+
+  Rectangle {
+    visible: root.debugBounds
+    anchors.fill: parent
+    color: "transparent"
+    border.width: 1
+    border.color: "#4488ff"
+  }
+}
diff --git a/shell/Ui/WidgetButton.qml b/shell/Ui/WidgetButton.qml
index 951cb4af..1641fcfd 100644
--- a/shell/Ui/WidgetButton.qml
+++ b/shell/Ui/WidgetButton.qml
@@ -12,7 +12,6 @@ Item {
   property color activeColor: bar ? bar.urgent : Color.urgent
   property bool active: false
   property real horizontalMargin: 8.5
-  property real rightExtraMargin: 0
   property real verticalPadding: 6
   property real fixedWidth: -1
   property real fixedHeight: -1
@@ -24,6 +23,8 @@ Item {
   property bool pressable: true
   property bool useActiveColor: true
   property bool maintainIndicatorReveal: false
+  property bool labelVisible: true
+  property bool hasVisualContent: text !== ""
   property var revealHost: bar
   property string tooltipText: ""
   property var registeredBar: null
@@ -56,13 +57,12 @@ Item {
   readonly property bool vertical: bar ? bar.vertical : false
   readonly property int barSize: bar ? bar.barSize : Style.bar.sizeHorizontal
   readonly property real scaledHorizontalMargin: Style.spaceReal(horizontalMargin)
-  readonly property real scaledRightExtraMargin: Style.spaceReal(rightExtraMargin)
   readonly property real scaledVerticalPadding: Style.spaceReal(verticalPadding)
   readonly property bool tooltipHovered: visible && interactive && !concealed && mouseArea.containsMouse
 
-  visible: text !== "" || keepSpace
-  opacity: text === "" || concealed ? 0 : (dimmed ? 0.45 : 1)
-  implicitWidth: fixedWidth > 0 ? fixedWidth : (vertical ? barSize : Math.max(12, label.implicitWidth + scaledHorizontalMargin * 2 + scaledRightExtraMargin))
+  visible: hasVisualContent || keepSpace
+  opacity: !hasVisualContent || concealed ? 0 : (dimmed ? 0.45 : 1)
+  implicitWidth: fixedWidth > 0 ? fixedWidth : (vertical ? barSize : Math.max(12, label.implicitWidth + scaledHorizontalMargin * 2))
   implicitHeight: fixedHeight > 0 ? fixedHeight : (vertical ? Math.max(12, label.implicitHeight + scaledVerticalPadding * 2) : barSize)
 
   Behavior on opacity {
@@ -71,8 +71,8 @@ Item {
 
   Text {
     id: label
+    visible: root.labelVisible
     anchors.centerIn: parent
-    anchors.horizontalCenterOffset: root.vertical ? 0 : -root.scaledRightExtraMargin / 2
     text: root.text
     color: root.active && root.useActiveColor ? root.activeColor : root.foreground
     font.family: root.fontFamily
diff --git a/shell/Ui/qmldir b/shell/Ui/qmldir
index 5e436654..5953f312 100644
--- a/shell/Ui/qmldir
+++ b/shell/Ui/qmldir
@@ -1,6 +1,7 @@
 module qs.Ui
 
 BarIndicator 1.0 BarIndicator.qml
+BarIconButton 1.0 BarIconButton.qml
 BarWidget 1.0 BarWidget.qml
 BorderOverlay 1.0 BorderOverlay.qml
 BorderSurface 1.0 BorderSurface.qml
@@ -12,6 +13,7 @@ Dropdown 1.0 Dropdown.qml
 KeyboardPanel 1.0 KeyboardPanel.qml
 MultiSelect 1.0 MultiSelect.qml
 NumberField 1.0 NumberField.qml
+OpticalGlyph 1.0 OpticalGlyph.qml
 Panel 1.0 Panel.qml
 PanelActionButton 1.0 PanelActionButton.qml
 PanelController 1.0 PanelController.qml
diff --git a/shell/plugins/bar/Bar.qml b/shell/plugins/bar/Bar.qml
index 939019d8..9a0b320c 100644
--- a/shell/plugins/bar/Bar.qml
+++ b/shell/plugins/bar/Bar.qml
@@ -1297,13 +1297,6 @@ Item {
     readonly property bool hovered: moduleHover.hovered
     readonly property bool dragSource: root.barDragSource === slot
     readonly property bool panelOpen: root.activePopout === slot.activeItem
-    readonly property real openIndicatorInlineOffset: {
-      var item = slot.activeItem
-      if (!item || !("openIndicatorInlineOffset" in item)) return 0
-      var offset = Number(item.openIndicatorInlineOffset)
-      return isFinite(offset) ? offset : 0
-    }
-
     implicitWidth: activeItem && activeItem.visible ? (root.vertical ? root.barSize : activeItem.implicitWidth) : 0
     implicitHeight: activeItem && activeItem.visible ? activeItem.implicitHeight : 0
     width: implicitWidth
@@ -1377,9 +1370,9 @@ Item {
       height: root.vertical ? Math.max(Style.space(10), Math.round(parent.height * 0.55)) : Style.space(2)
       x: root.vertical
         ? (root.position === "left" ? parent.width - width - inset : inset)
-        : (slot.openIndicatorInlineOffset === 0 ? Math.round((parent.width - width) / 2) : (parent.width - width) / 2 + slot.openIndicatorInlineOffset)
+        : Math.round((parent.width - width) / 2)
       y: root.vertical
-        ? (slot.openIndicatorInlineOffset === 0 ? Math.round((parent.height - height) / 2) : (parent.height - height) / 2 + slot.openIndicatorInlineOffset)
+        ? Math.round((parent.height - height) / 2)
         : (root.position === "top" ? parent.height - height - inset : inset)
       z: 50
 
diff --git a/shell/plugins/bar/widgets/Microphone.qml b/shell/plugins/bar/widgets/Microphone.qml
index 200eae97..4f1bf211 100644
--- a/shell/plugins/bar/widgets/Microphone.qml
+++ b/shell/plugins/bar/widgets/Microphone.qml
@@ -34,7 +34,7 @@ BarWidget {
 
   PwObjectTracker { objects: root.source ? [root.source] : [] }
 
-  WidgetButton {
+  BarIconButton {
     id: button
     anchors.fill: parent
     bar: root.bar
diff --git a/shell/plugins/bar/widgets/SystemUpdate.qml b/shell/plugins/bar/widgets/SystemUpdate.qml
index e91a8f6b..b6563741 100644
--- a/shell/plugins/bar/widgets/SystemUpdate.qml
+++ b/shell/plugins/bar/widgets/SystemUpdate.qml
@@ -52,12 +52,11 @@ BarWidget {
     onTriggered: root.refresh()
   }
 
-  WidgetButton {
+  BarIconButton {
     id: button
     anchors.fill: parent
     bar: root.bar
     text: "\uf021"
-    fontSize: Style.font.caption
     tooltipText: ""
     onPressed: root.runUpdate()
   }
diff --git a/shell/plugins/bar/widgets/Tray.qml b/shell/plugins/bar/widgets/Tray.qml
index be55ceb8..06f2734a 100644
--- a/shell/plugins/bar/widgets/Tray.qml
+++ b/shell/plugins/bar/widgets/Tray.qml
@@ -24,9 +24,9 @@ BarWidget {
   readonly property var drawerItems: bucket("drawer")
   readonly property var allItems: bucket("all")
   readonly property int drawerCount: drawerItems.length
-  readonly property int trayItemExtent: Style.space(16)
-  readonly property int trayItemGap: Style.space(9)
-  readonly property int trayJoinGap: Style.space(4)
+  readonly property int trayItemExtent: Style.bar.iconSlot
+  readonly property int trayItemGap: 0
+  readonly property int trayJoinGap: 0
   readonly property int drawerExtent: drawerCount > 0 ? drawerCount * trayItemExtent + (drawerCount - 1) * trayItemGap : 0
   // Match Waybar's group/tray-expander drawer transition-duration.
   readonly property int animationDuration: 600
@@ -182,15 +182,13 @@ BarWidget {
           onHoveredChanged: root.expanded = hovered
         }
 
-        WidgetButton {
+        BarIconButton {
           id: expandIcon
           bar: root.bar
           width: implicitWidth
           height: implicitHeight
           x: root.drawerExtent - root.revealExtent
           text: "\uf053"
-          horizontalMargin: 9
-          verticalPadding: 6
           onPressed: function(button) {
             if (button === Qt.RightButton) root.managePopupOpen = !root.managePopupOpen
           }
@@ -266,7 +264,7 @@ BarWidget {
           onHoveredChanged: root.expanded = hovered
         }
 
-        WidgetButton {
+        BarIconButton {
           id: expandIcon
           bar: root.bar
           width: implicitWidth
@@ -274,8 +272,6 @@ BarWidget {
           y: root.drawerExtent - root.revealExtent
           text: "\uf053"
           textRotation: 90
-          horizontalMargin: 9
-          verticalPadding: 6
           onPressed: function(button) {
             if (button === Qt.RightButton) root.managePopupOpen = !root.managePopupOpen
           }
diff --git a/shell/plugins/panels/audio/Panel.qml b/shell/plugins/panels/audio/Panel.qml
index 35abd1dc..bdce12b3 100644
--- a/shell/plugins/panels/audio/Panel.qml
+++ b/shell/plugins/panels/audio/Panel.qml
@@ -522,14 +522,11 @@ Panel {
     onTriggered: root.refreshDisplayAudioModels()
   }
 
-  WidgetButton {
+  BarIconButton {
     id: button
     anchors.fill: parent
     bar: root.bar
     text: root.outputIcon()
-    fontSize: Style.font.body
-    fixedWidth: root.bar && root.bar.vertical ? -1 : Style.space(27)
-    fixedHeight: root.bar && root.bar.vertical ? Style.space(26) : -1
     onPressed: function(b) {
       if (b === Qt.RightButton) root.toggleOutputMute()
       else root.toggle()
diff --git a/shell/plugins/panels/bluetooth/Panel.qml b/shell/plugins/panels/bluetooth/Panel.qml
index 2c23e4c8..5b43d5cf 100644
--- a/shell/plugins/panels/bluetooth/Panel.qml
+++ b/shell/plugins/panels/bluetooth/Panel.qml
@@ -469,13 +469,11 @@ Panel {
     })
   }
 
-  WidgetButton {
+  BarIconButton {
     id: button
     anchors.fill: parent
     bar: root.bar
     text: root.icon
-    fixedWidth: root.bar && root.bar.vertical ? -1 : Style.space(27)
-    fixedHeight: root.bar && root.bar.vertical ? Style.space(26) : -1
     onPressed: function(b) {
       if (b === Qt.RightButton) root.toggleBluetooth()
       else if (b === Qt.MiddleButton) root.bar.run("omarchy-launch-bluetooth")
diff --git a/shell/plugins/panels/dropbox/Panel.qml b/shell/plugins/panels/dropbox/Panel.qml
index 92203a56..031853fe 100644
--- a/shell/plugins/panels/dropbox/Panel.qml
+++ b/shell/plugins/panels/dropbox/Panel.qml
@@ -139,48 +139,25 @@ Panel {
     function status(): string { return dropbox.statusText }
   }
 
-  Item {
+  BarIconButton {
     id: button
     anchors.fill: parent
-    implicitWidth: root.bar && root.bar.vertical ? root.bar.barSize : Style.space(27)
-    implicitHeight: root.bar && root.bar.vertical ? Style.space(26) : (root.bar ? root.bar.barSize : Style.space(26))
-
-    property var registeredBar: null
-
-    function triggerPress(buttonCode) {
+    bar: root.bar
+    iconComponent: Component {
+      Item {
+        DropboxIcon {
+          anchors.centerIn: parent
+          iconSize: Style.space(12)
+          color: root.barIconColor
+          opacity: dropbox.authenticated ? 1.0 : 0.6
+        }
+      }
+    }
+    onPressed: function(buttonCode) {
       if (buttonCode === Qt.RightButton) dropbox.refresh()
       else if (buttonCode === Qt.MiddleButton) dropbox.login()
       else root.toggle()
     }
-
-    function syncClickRegistration() {
-      if (registeredBar && registeredBar.unregisterClickTarget) registeredBar.unregisterClickTarget(button)
-      registeredBar = root.bar
-      if (registeredBar && registeredBar.registerClickTarget) registeredBar.registerClickTarget(button)
-    }
-
-    Component.onCompleted: syncClickRegistration()
-    Component.onDestruction: if (registeredBar && registeredBar.unregisterClickTarget) registeredBar.unregisterClickTarget(button)
-
-    Connections {
-      target: root
-      function onBarChanged() { button.syncClickRegistration() }
-    }
-
-    DropboxIcon {
-      anchors.centerIn: parent
-      iconSize: Style.space(12)
-      color: root.barIconColor
-      opacity: dropbox.authenticated ? 1.0 : 0.6
-    }
-
-    MouseArea {
-      anchors.fill: parent
-      acceptedButtons: Qt.LeftButton | Qt.RightButton | Qt.MiddleButton
-      hoverEnabled: true
-      cursorShape: Qt.PointingHandCursor
-      onClicked: function(mouse) { button.triggerPress(mouse.button) }
-    }
   }
 
   KeyboardPanel {
diff --git a/shell/plugins/panels/monitor/Panel.qml b/shell/plugins/panels/monitor/Panel.qml
index 75d19fc0..1ca893c7 100644
--- a/shell/plugins/panels/monitor/Panel.qml
+++ b/shell/plugins/panels/monitor/Panel.qml
@@ -337,15 +337,11 @@ Panel {
     onRunningChanged: if (!running) root.refresh()
   }
 
-  WidgetButton {
+  BarIconButton {
     id: button
     anchors.fill: parent
     bar: root.bar
     text: root.displays.length > 1 ? "󰍺" : "󰍹"
-    fontSize: Style.font.subtitle
-    fixedWidth: root.bar && root.bar.vertical ? -1 : Style.space(27)
-    fixedHeight: root.bar && root.bar.vertical ? Style.space(26) : -1
-    rightExtraMargin: 4
     onPressed: function(b) { root.toggle() }
     onWheelMoved: function(delta) {
       if (root.brightnessAvailable) root.setBrightness(root.brightnessPercent + (delta > 0 ? 5 : -5))
diff --git a/shell/plugins/panels/network/Panel.qml b/shell/plugins/panels/network/Panel.qml
index e4b3ea9b..2d3c9bae 100644
--- a/shell/plugins/panels/network/Panel.qml
+++ b/shell/plugins/panels/network/Panel.qml
@@ -707,14 +707,11 @@ Panel {
     }
   }
 
-  WidgetButton {
+  BarIconButton {
     id: button
     anchors.fill: parent
     bar: root.bar
     text: root.icon
-    fixedWidth: root.bar && root.bar.vertical ? -1 : Style.space(27)
-    fixedHeight: root.bar && root.bar.vertical ? Style.space(26) : -1
-    rightExtraMargin: 5.5
 
     onPressed: function(b) {
       if (root.opened) root.close()
diff --git a/shell/plugins/panels/power/Panel.qml b/shell/plugins/panels/power/Panel.qml
index 1f0f3b79..e5fb1f49 100644
--- a/shell/plugins/panels/power/Panel.qml
+++ b/shell/plugins/panels/power/Panel.qml
@@ -249,13 +249,11 @@ Panel {
     }
   }
 
-  WidgetButton {
+  BarIconButton {
     id: button
     anchors.fill: parent
     bar: root.bar
     text: root.batteryIcon()
-    fixedWidth: root.bar && root.bar.vertical ? -1 : Style.space(27)
-    fixedHeight: root.bar && root.bar.vertical ? Style.space(26) : -1
     tooltipText: ""
     onPressed: function(b) { if (root.batteryPresent) root.toggle() }
   }
diff --git a/shell/plugins/panels/tailscale/Panel.qml b/shell/plugins/panels/tailscale/Panel.qml
index a6e084f7..e0de662e 100644
--- a/shell/plugins/panels/tailscale/Panel.qml
+++ b/shell/plugins/panels/tailscale/Panel.qml
@@ -12,7 +12,6 @@ Panel {
   ipcTarget: "omarchy.tailscale"
   manageIpc: false
 
-  readonly property real openIndicatorInlineOffset: bar && bar.vertical ? 0 : Style.spaceReal(1.5)
   property string focusSection: "header"
   property int headerIndex: 0
   property int accountIndex: 0
@@ -360,53 +359,27 @@ Panel {
     function status(): string { return tailscale.statusText }
   }
 
-  Item {
+  BarIconButton {
     id: button
     anchors.fill: parent
-    implicitWidth: root.bar && root.bar.vertical ? root.bar.barSize : Style.space(27)
-    implicitHeight: root.bar && root.bar.vertical ? Style.space(26) : (root.bar ? root.bar.barSize : Style.space(26))
-
-    property var registeredBar: null
-
-    function triggerPress(buttonCode) {
+    bar: root.bar
+    iconComponent: Component {
+      Item {
+        TailscaleIcon {
+          anchors.centerIn: parent
+          iconSize: Style.space(11)
+          color: root.barIconColor
+          badgeColor: root.urgent
+          crossed: !tailscale.running && !tailscale.needsLogin
+          warning: tailscale.needsLogin
+        }
+      }
+    }
+    onPressed: function(buttonCode) {
       if (buttonCode === Qt.RightButton) tailscale.toggleTailscale()
       else if (buttonCode === Qt.MiddleButton) tailscale.refresh()
       else root.toggle()
     }
-
-    function syncClickRegistration() {
-      if (registeredBar && registeredBar.unregisterClickTarget) registeredBar.unregisterClickTarget(button)
-      registeredBar = root.bar
-      if (registeredBar && registeredBar.registerClickTarget) registeredBar.registerClickTarget(button)
-    }
-
-    Component.onCompleted: syncClickRegistration()
-    Component.onDestruction: if (registeredBar && registeredBar.unregisterClickTarget) registeredBar.unregisterClickTarget(button)
-
-    Connections {
-      target: root
-      function onBarChanged() { button.syncClickRegistration() }
-    }
-
-    TailscaleIcon {
-      anchors.centerIn: parent
-      anchors.horizontalCenterOffset: root.openIndicatorInlineOffset
-      anchors.verticalCenterOffset: -Style.space(1)
-      iconSize: Style.space(12) * 0.85
-      color: root.barIconColor
-      badgeColor: root.urgent
-      crossed: !tailscale.running && !tailscale.needsLogin
-      warning: tailscale.needsLogin
-    }
-
-    MouseArea {
-      id: mouseArea
-      anchors.fill: parent
-      acceptedButtons: Qt.LeftButton | Qt.RightButton | Qt.MiddleButton
-      hoverEnabled: true
-      cursorShape: Qt.PointingHandCursor
-      onClicked: function(mouse) { button.triggerPress(mouse.button) }
-    }
   }
 
   KeyboardPanel {
diff --git a/test/shell.d/bar-icon-geometry-test.sh b/test/shell.d/bar-icon-geometry-test.sh
new file mode 100644
index 00000000..6e6eb5cd
--- /dev/null
+++ b/test/shell.d/bar-icon-geometry-test.sh
@@ -0,0 +1,102 @@
+#!/bin/bash
+
+set -euo pipefail
+
+source "$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)/base-test.sh"
+
+if ! command -v quickshell >/dev/null 2>&1; then
+  pass "quickshell not installed; skipping bar icon geometry test"
+  exit 0
+fi
+
+test_tmp=$(mktemp -d)
+trap 'rm -rf "$test_tmp"' EXIT
+
+ln -s "$ROOT/shell/Ui" "$test_tmp/Ui"
+ln -s "$ROOT/shell/Commons" "$test_tmp/Commons"
+
+cat >"$test_tmp/shell.qml" <<'QML'
+import QtQuick
+import Quickshell
+import qs.Commons
+import qs.Ui
+
+ShellRoot {
+  id: root
+
+  function fail(message) {
+    console.log("RESULT fail " + message)
+    Qt.quit()
+  }
+
+  function checkIcon(icon, name) {
+    if (icon.implicitWidth !== Style.bar.iconSlot) {
+      fail(name + " slot width is " + icon.implicitWidth)
+      return false
+    }
+    if (icon.opticalSize !== Style.bar.iconCanvas) {
+      fail(name + " optical canvas is " + icon.opticalSize)
+      return false
+    }
+    if (Math.abs(icon.opticalCenterErrorX) > 0.5 || Math.abs(icon.opticalCenterErrorY) > 0.5) {
+      fail(name + " painted bounds are over half a pixel off center by " + icon.opticalCenterErrorX + "," + icon.opticalCenterErrorY)
+      return false
+    }
+    return true
+  }
+
+  Component.onCompleted: Qt.callLater(function() {
+    if (!checkIcon(bluetooth, "bluetooth")) return
+    if (!checkIcon(network, "network")) return
+    if (!checkIcon(audio, "audio")) return
+    if (!checkIcon(monitor, "monitor")) return
+    if (!checkIcon(power, "power")) return
+    if (vector.implicitWidth !== Style.bar.iconSlot || vector.opticalSize !== Style.bar.iconCanvas) {
+      fail("vector icon does not share glyph geometry")
+      return
+    }
+    console.log("RESULT pass")
+    Qt.quit()
+  })
+
+  QtObject {
+    id: testBar
+    property bool vertical: false
+    property int barSize: Style.bar.sizeHorizontal
+    property string fontFamily: Style.font.family
+    property color barForeground: "white"
+    property color urgent: "red"
+    property bool foregroundAnimationEnabled: false
+    function registerClickTarget(target) {}
+    function unregisterClickTarget(target) {}
+    function hideTooltip(target) {}
+    function showTooltip(target, text) {}
+  }
+
+  BarIconButton { id: bluetooth; bar: testBar; text: "󰂯" }
+  BarIconButton { id: network; bar: testBar; text: "󰖩" }
+  BarIconButton { id: audio; bar: testBar; text: "󰖁" }
+  BarIconButton { id: monitor; bar: testBar; text: "󰍹" }
+  BarIconButton { id: power; bar: testBar; text: "󰁹" }
+  BarIconButton {
+    id: vector
+    bar: testBar
+    iconComponent: Component { Rectangle { width: 12; height: 12 } }
+  }
+}
+QML
+
+output=$(timeout 15 env \
+  QML2_IMPORT_PATH="$ROOT/shell${QML2_IMPORT_PATH:+:$QML2_IMPORT_PATH}" \
+  QML_IMPORT_PATH="$ROOT/shell${QML_IMPORT_PATH:+:$QML_IMPORT_PATH}" \
+  quickshell -p "$test_tmp" --no-color 2>&1) || {
+  printf '%s\n' "$output" >&2
+  fail "bar icon geometry fixture exits cleanly"
+}
+
+if ! grep -q 'RESULT pass' <<<"$output"; then
+  printf '%s\n' "$output" >&2
+  fail "bar icons share centered optical geometry"
+fi
+
+pass "bar icons share centered optical geometry"