Inital commit checkpoint

common/widgets/NavigationRailTabArray.qml

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+// NavigationRailTabArray.qml from end-4 https://github.com/end-4/dots-hyprland/blob/eac4ab3e3c249008d9596023f79dbc2d31012600/.config/quickshell/ii/modules/common/widgets/NavigationRailTabArray.qml
+import qs.common
+import QtQuick
+import QtQuick.Layouts
+
+Item {
+    id: root
+    property int currentIndex: 0
+    property bool expanded: false
+    default property alias data: tabBarColumn.data  
+    implicitHeight: tabBarColumn.implicitHeight
+    implicitWidth: tabBarColumn.implicitWidth
+    Layout.topMargin: 25
+    Rectangle {
+        property real itemHeight: tabBarColumn.children[0].baseSize
+        property real baseHighlightHeight: tabBarColumn.children[0].baseHighlightHeight
+        anchors {
+            top: tabBarColumn.top
+            left: tabBarColumn.left
+            topMargin: itemHeight * root.currentIndex + (root.expanded ? 0 : ((itemHeight - baseHighlightHeight) / 2))
+        }
+        radius: Appearance.rounding.full
+        color: Appearance.colors.colSecondaryContainer
+        implicitHeight: root.expanded ? itemHeight : baseHighlightHeight
+        implicitWidth: tabBarColumn.children[root.currentIndex].visualWidth
+
+        Behavior on anchors.topMargin {
+            NumberAnimation {
+                duration: Appearance.animationCurves.expressiveFastSpatialDuration
+                easing.type: Appearance.animation.elementMove.type
+                easing.bezierCurve: Appearance.animationCurves.expressiveFastSpatial
+            }
+        }
+    }
+    ColumnLayout {
+        id: tabBarColumn
+        anchors.fill: parent
+        spacing: 0
+    }
+}