add shadows to bar modules

modules/bar/ActiveWindow.qml

@@ -1,3 +1,4 @@
+pragma ComponentBehavior: Bound
 import Quickshell.Widgets
 import Quickshell.Hyprland
 import QtQuick
@@ -5,10 +6,21 @@ import QtQuick.Layouts
 import qs
 import qs.widgets
 import qs.settings
+import QtQuick.Effects
 
 Rectangle {
     id: root
     required property double moduleHeight
+    layer.enabled: true
+    layer.effect: MultiEffect {
+        id: dropShadow
+        source: root
+        shadowEnabled: true
+        shadowHorizontalOffset: 4
+        shadowVerticalOffset: 2
+        shadowOpacity: 0.5
+        shadowColor: "#020202"
+    }
     implicitHeight: moduleHeight
     implicitWidth: titleLayout.width + 32
     color: Colors.base02