Use explicit workspace mutation requests for window sync

editor/app/Windowing/Content/EditorWorkspaceWindowContentController.cpp

@@ -33,8 +33,10 @@ EditorWindowContentCursorKind ToContentCursorKind(
 } // namespace
 
 EditorWorkspaceWindowContentController::EditorWorkspaceWindowContentController(
+    std::string windowId,
     UIEditorWorkspaceController workspaceController)
-    : m_workspaceController(std::move(workspaceController)) {}
+    : m_windowId(std::move(windowId)),
+      m_workspaceController(std::move(workspaceController)) {}
 
 EditorWorkspaceWindowContentController::~EditorWorkspaceWindowContentController() = default;
 
@@ -131,6 +133,7 @@ EditorWindowFrameTransferRequests EditorWorkspaceWindowContentController::Update
         transferRequests.workspace.workspaceMutation = EditorWindowWorkspaceMutationRequest{
             .windowState =
                 UIEditorWindowWorkspaceState{
+                    .windowId = m_windowId,
                     .workspace = m_workspaceController.GetWorkspace(),
                     .session = m_workspaceController.GetSession(),
                 },
@@ -220,8 +223,10 @@ std::string EditorWorkspaceWindowContentController::ResolveDetachedWindowTitleTe
 }
 
 std::unique_ptr<EditorWindowContentController> CreateEditorWorkspaceWindowContentController(
+    std::string_view windowId,
     UIEditorWorkspaceController workspaceController) {
     return std::make_unique<EditorWorkspaceWindowContentController>(
+        std::string(windowId),
         std::move(workspaceController));
 }