checkpoint(new_editor): native d3d12 ui path

Key node 1: move main-window UI presentation onto the D3D12 render loop with native UI renderer, text system, and texture host.

Key node 2: wire frame timing/FPS display, window runtime, swapchain presentation, and native screenshot capture around the new path.

Key node 3: carry editor shell/workspace/viewport/panel interaction updates needed by the new renderer and detached window flow.

Key node 4: pump async resource loads and scene bridge follow-up needed for scene content visibility in new_editor.

new_editor/include/XCEditor/Shell/UIEditorShellInteraction.h

@@ -143,7 +143,6 @@ UIEditorShellInteractionModel ResolveUIEditorShellInteractionModel(
 
 UIEditorShellInteractionRequest ResolveUIEditorShellInteractionRequest(
     const ::XCEngine::UI::UIRect& bounds,
-    const UIEditorWorkspaceController& controller,
     const UIEditorShellInteractionModel& model,
     const UIEditorShellInteractionState& state = {},
     const UIEditorShellInteractionMetrics& metrics = {},