Refactor editor window synchronization flow

editor/app/Windowing/Frame/EditorWindowTransferRequests.h

@@ -7,6 +7,8 @@
 #include "Windowing/EditorWindowShared.h"
 #include "UtilityWindows/EditorUtilityWindowKind.h"
 
+#include <XCEditor/Workspace/UIEditorWindowWorkspaceModel.h>
+
 #include <optional>
 #include <string>
 
@@ -22,6 +24,14 @@ struct EditorWindowPanelTransferRequest {
     }
 };
 
+struct EditorWindowWorkspaceMutationRequest {
+    XCEngine::UI::Editor::UIEditorWindowWorkspaceState windowState = {};
+
+    bool IsValid() const {
+        return !windowState.windowId.empty();
+    }
+};
+
 struct EditorWindowOpenUtilityWindowRequest {
     EditorUtilityWindowKind kind = EditorUtilityWindowKind::None;
     EditorWindowScreenPoint screenPoint = {};
@@ -33,11 +43,13 @@ struct EditorWindowOpenUtilityWindowRequest {
 };
 
 struct EditorWorkspaceWindowFrameTransferRequests {
+    std::optional<EditorWindowWorkspaceMutationRequest> workspaceMutation = {};
     std::optional<EditorWindowPanelTransferRequest> beginGlobalTabDrag = {};
     std::optional<EditorWindowPanelTransferRequest> detachPanel = {};
 
     bool HasPendingRequests() const {
-        return beginGlobalTabDrag.has_value() ||
+        return workspaceMutation.has_value() ||
+            beginGlobalTabDrag.has_value() ||
             detachPanel.has_value();
     }
 };