refactor(new_editor): streamline internal layout and command routing

new_editor/src/Workspace/UIEditorWorkspaceCompose.cpp

@@ -290,7 +290,8 @@ void AppendUIEditorWorkspaceCompose(
     const Widgets::UIEditorDockHostPalette& dockHostPalette,
     const Widgets::UIEditorDockHostMetrics& dockHostMetrics,
     const Widgets::UIEditorViewportSlotPalette& viewportPalette,
-    const Widgets::UIEditorViewportSlotMetrics& viewportMetrics) {
+    const Widgets::UIEditorViewportSlotMetrics& viewportMetrics,
+    const UIEditorWorkspaceComposeAppendOptions& options) {
     AppendUIEditorDockHostBackground(
         drawList,
         frame.dockHostLayout,
@@ -321,6 +322,7 @@ void AppendUIEditorWorkspaceCompose(
     UIEditorDockHostForegroundOptions foregroundOptions = {};
     foregroundOptions.externalBodyPanelIds =
         CollectUIEditorWorkspaceComposeExternalBodyPanelIds(frame);
+    foregroundOptions.deferDropPreviewOverlay = options.deferDockPreviewOverlay;
     AppendUIEditorDockHostForeground(
         drawList,
         frame.dockHostLayout,
@@ -329,4 +331,16 @@ void AppendUIEditorWorkspaceCompose(
         dockHostMetrics);
 }
 
+void AppendUIEditorWorkspaceComposeOverlay(
+    ::XCEngine::UI::UIDrawList& drawList,
+    const UIEditorWorkspaceComposeFrame& frame,
+    const Widgets::UIEditorDockHostPalette& dockHostPalette,
+    const Widgets::UIEditorDockHostMetrics& dockHostMetrics) {
+    AppendUIEditorDockHostOverlay(
+        drawList,
+        frame.dockHostLayout,
+        dockHostPalette,
+        dockHostMetrics);
+}
+
 } // namespace XCEngine::UI::Editor