fix(ui): adapt icon position labels based on bar orientation

- Add barIsVertical property to BarWidgetSettingsDialog
- Pass barIsVertical from NSectionEditor to dialog
- Show Top/Bottom for vertical bar, Left/Right for horizontal bar
- Keep fallback to oppositeDirection when iconPosition not set
- Fix BarPillVertical iconPosition mapping (left=top, right=bottom)

Modules/Panels/Settings/Bar/BarWidgetSettingsDialog.qml

@@ -15,6 +15,7 @@ Popup {
   property string widgetId: ""
   property string sectionId: ""
   property var screen: null
+  property bool barIsVertical: false
   property var settingsCache: ({})
 
   readonly property real maxHeight: (screen ? screen.height : (parent ? parent.height : 800)) * 0.8
@@ -185,6 +186,7 @@ Popup {
       }
       settingsLoader.setSource(source, {
                                  "screen": screen,
+                                 "barIsVertical": barIsVertical,
                                  "widgetData": currentWidgetData,
                                  "widgetMetadata": BarWidgetRegistry.widgetMetadata[widgetId]
                                });

Modules/Panels/Settings/Bar/WidgetSettings/CustomButtonSettings.qml

@@ -17,6 +17,9 @@ ColumnLayout {
 
   signal settingsChanged(var settings)
 
+  // Bar orientation (per-screen) - passed from parent
+  property bool barIsVertical: false
+
   property string valueIcon: widgetData.icon !== undefined ? widgetData.icon : widgetMetadata.icon
   property string valueIconPosition: widgetData.iconPosition !== undefined ? widgetData.iconPosition : widgetMetadata.iconPosition
   property bool valueTextStream: widgetData.textStream !== undefined ? widgetData.textStream : widgetMetadata.textStream
@@ -101,9 +104,19 @@ ColumnLayout {
 
   NComboBox {
     id: iconPositionComboBox
+    visible: valueShowIcon
     label: I18n.tr("bar.custom-button.icon-position-label")
     description: I18n.tr("bar.custom-button.icon-position-description")
-    model: [
+    model: barIsVertical ? [
+      {
+        name: I18n.tr("bar.custom-button.icon-position-top"),
+        key: "left"
+      },
+      {
+        name: I18n.tr("bar.custom-button.icon-position-bottom"),
+        key: "right"
+      }
+    ] : [
       {
         name: I18n.tr("bar.custom-button.icon-position-left"),
         key: "left"