Close desktop safety gaps

config/dot/quickshell/wallpaper-settings-harness.qml

@@ -46,6 +46,16 @@ ShellRoot {
             return JSON.stringify(root.calls);
         }
 
+        function selectOutput(output: string): void {
+            controls.selectedOutput = output;
+        }
+
+        function updateOutputs(outputs: string): void {
+            controls.outputs = outputs === "" ? [] : outputs.split("|");
+        }
+
+        function selectedOutput(): string { return controls.selectedOutput; }
+
         function states(): string {
             picker.mode = "single";
             const single = {