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/shared/package.build.test.ts

@@ -11,6 +11,7 @@ void test('package.json: конфиг electron-builder (mac/win/linux)', () => {
     build: {
       appId: string;
       asar: boolean;
+      npmRebuild: boolean;
       asarUnpack: string[];
       extraResources: { from: string; to: string }[];
       mac: { target: unknown; artifactName?: string };
@@ -25,6 +26,11 @@ void test('package.json: конфиг electron-builder (mac/win/linux)', () => {
   assert.ok(pkg.build);
   assert.equal(pkg.build.appId, 'com.ttrpgplayer.app');
   assert.equal(pkg.build.asar, true, 'релизный артефакт: app.asar без «голого» дерева dist в .app/.exe');
+  assert.equal(
+    pkg.build.npmRebuild,
+    false,
+    'N-API prebuilds (classic-level, sharp @img) — без node-gyp / Visual Studio на pack',
+  );
   assert.ok(Array.isArray(pkg.build.asarUnpack));
   assert.ok(pkg.build.asarUnpack.some((p) => p.includes('preload')));
   assert.ok(Array.isArray(pkg.build.extraResources));
@@ -56,6 +62,10 @@ void test('package.json: конфиг electron-builder (mac/win/linux)', () => {
     pkg.build.asarUnpack.some((p) => p.includes('@img')),
     'sharp native binaries live under node_modules/@img',
   );
+  assert.ok(
+    pkg.build.asarUnpack.some((p) => p.includes('classic-level')),
+    'Foundry DB: classic-level stays unpacked with its prebuilds',
+  );
 });
 
 void test('package.json: pack:mac runs release-mac-prep before electron-builder', () => {