Add lock screen background

Widgets/Corner.qml

@@ -9,13 +9,14 @@ PanelWindow {
     required property real radius
     required property int angle
     required property color fillColor
+    required property var modelData
     WlrLayershell.layer: WlrLayer.Overlay
+    screen: modelData
 
     color: "transparent"
     implicitWidth: corner.radius
     implicitHeight: corner.radius
 
-
     function anglePointX(angle) {
         return (corner.radius * Math.sqrt(2) * 1/2 * Math.sin(angle)) + corner.radius/2
     }