add hover glow to all bar modules

modules/BarIcon.qml

@@ -1,4 +1,5 @@
 import QtQuick
+import QtQuick.Effects
 import Quickshell
 import "." as M
 
@@ -6,6 +7,7 @@ Text {
     id: root
     property string icon: ""
     property string tooltip: ""
+    property bool _hovered: false
 
     text: icon
     color: M.Theme.base05
@@ -13,8 +15,18 @@ Text {
     font.family: M.Theme.iconFontFamily
     verticalAlignment: Text.AlignVCenter
 
+    layer.enabled: _hovered
+    layer.effect: MultiEffect {
+        shadowEnabled: true
+        shadowColor: M.Theme.base05
+        shadowBlur: 0.5
+        shadowVerticalOffset: 0
+        shadowHorizontalOffset: 0
+    }
+
     HoverHandler {
         onHoveredChanged: {
+            root._hovered = hovered;
             if (hovered && root.tooltip !== "") {
                 M.FlyoutState.text = root.tooltip;
                 M.FlyoutState.itemX = root.mapToGlobal(root.width / 2, 0).x - (QsWindow.window?.screen?.x ?? 0);