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>

scripts/release-linux-pack.mjs

@@ -9,6 +9,11 @@ import { spawnSync } from 'node:child_process';
 import fs from 'node:fs';
 import path from 'node:path';
 import process from 'node:process';
+import { fileURLToPath } from 'node:url';
+
+import { ensureReleaseNativeDeps } from './release-native-prep.mjs';
+
+const projectRoot = path.resolve(path.dirname(fileURLToPath(import.meta.url)), '..');
 
 function run(command, args) {
   const result = spawnSync(command, args, {
@@ -63,5 +68,6 @@ if (process.platform === 'win32') {
 }
 
 run('npm', ['run', 'build']);
+ensureReleaseNativeDeps(projectRoot, 'linux');
 run('electron-builder', ['--linux']);
 normalizeLinuxReleaseNames();