Integrate complete display layouts

config/dot/quickshell/services/Displays.qml

@@ -365,8 +365,8 @@ Singleton {
 
     // Applies immediately and starts the countdown. Nothing is stored yet: the
     // complete connected layout is only written by confirm().
-    function applyLayout(layout: var): bool {
-        if (root.externalChangeBlocked) {
+    function applyLayout(layout: var, protectedOperation: bool): bool {
+        if (root.externalChangeBlocked && protectedOperation !== true) {
             root.lastError = "Wait for Settings to finish restoring before changing a display.";
             return false;
         }
@@ -397,6 +397,13 @@ Singleton {
         return true;
     }
 
+    // Settings restore holds the external-change lock while it proves a
+    // snapshot. This narrow entry point authorizes that one transaction while
+    // keeping every user-facing control blocked until restore settles.
+    function applyProtectedLayout(layout: var): bool {
+        return root.applyLayout(layout, true);
+    }
+
     function makePrimary(output: string): bool {
         const layout = root.currentLayout();
         if (!layout.some(record => record.name === output)) {