feat: multi-material overlays, presentation guides, and release prebuilds

Align control/presentation with presentation screen rect and darkness z-order; sync window titles and session window cleanup. Pack Win/Mac/Linux with npmRebuild disabled and release-native-prep for classic-level and sharp.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/renderer/shared/materials/MaterialOverlay.tsx

@@ -1,6 +1,6 @@
 import React, { useEffect, useRef, useState } from 'react';
 
-import type { AssetId, MaterialsOverlayLayout, MaterialsZoomTool, NpcsZoomTool } from '../../../shared/types';
+import type { AssetId, MaterialId, MaterialsOverlayLayout, MaterialsZoomTool, NpcsZoomTool } from '../../../shared/types';
 import { DEFAULT_MATERIALS_OVERLAY_LAYOUT } from '../../../shared/types';
 import { useSceneOverlayView } from '../sceneOverlay/SceneOverlayViewContext';
 import { useAssetUrl } from '../useAssetImageUrl';
@@ -12,6 +12,7 @@ type Corner = 'nw' | 'ne' | 'sw' | 'se';
 type MaterialOverlayProps = {
   assetId: AssetId | null;
   layout: MaterialsOverlayLayout;
+  materialId?: MaterialId;
   editable?: boolean;
   zoomTool?: MaterialsZoomTool | NpcsZoomTool;
   showClose?: boolean;
@@ -92,6 +93,7 @@ function localToScreenOffset(localX: number, localY: number, rotationDeg: number
 export function MaterialOverlay({
   assetId,
   layout,
+  materialId,
   editable = false,
   zoomTool = null,
   showClose = false,
@@ -366,6 +368,7 @@ export function MaterialOverlay({
     <div
       className={[styles.frame, editable && !zoomTool ? styles.frameEditable : ''].filter(Boolean).join(' ')}
       data-overlay-kind="material"
+      {...(materialId ? { 'data-material-id': materialId } : {})}
       style={{
         left,
         top,