internal: use multieffect for shadow

modules/drawers/Drawers.qml

@@ -8,6 +8,7 @@ import Quickshell
 import Quickshell.Wayland
 import Quickshell.Hyprland
 import QtQuick
+import QtQuick.Effects
 
 Variants {
     model: Quickshell.screens
@@ -100,8 +101,12 @@ Variants {
                 }
             }
 
-            LayerShadow {
+            MultiEffect {
+                anchors.fill: source
                 source: background
+                shadowEnabled: true
+                blurMax: 15
+                shadowColor: Qt.alpha(Colours.palette.m3shadow, 0.7)
             }
 
             PersistentProperties {

widgets/LayerShadow.qml

@@ -1,9 +0,0 @@
-import "root:/services"
-import Qt5Compat.GraphicalEffects
-
-DropShadow {
-    anchors.fill: source
-    color: Qt.alpha(Colours.palette.m3shadow, 0.7)
-    radius: 10
-    samples: 1 + radius * 2
-}