Qualify shell palette references for Qt 6.12 (#14553)

shell/plugins/lock/Service.qml

@@ -4,6 +4,7 @@ import Quickshell.Io
 import Quickshell.Services.Pam
 import Quickshell.Wayland
 import qs.Commons
+import qs.Commons as Commons
 import "FingerprintModel.js" as FingerprintModel
 
 Item {
@@ -467,7 +468,7 @@ Item {
 
     WlSessionLockSurface {
       id: lockSurface
-      color: Color.background
+      color: Commons.Color.background
 
       LockView {
         id: lockView