Add Notification Center and Game Optimizer themes

Extend Luma-style dark theme to two more Enact web overlays:
- com.webos.app.notificationcenter: dark pills, transparent
  compositor, notification-specific components
- com.webos.app.gameoptimizer: same plus GameItem, GameButton,
  GameSwitch, GamePanel custom components

Rename build.js → build.cjs (ESM compat) and update to build
all three themes from a single script.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

settings-theme/build.cjs

@@ -0,0 +1,41 @@
+const fs = require('fs');
+const path = require('path');
+
+const APPS = [
+  'com.palm.app.settings',
+  'com.webos.app.notificationcenter',
+  'com.webos.app.gameoptimizer',
+];
+
+const outDir = path.join(__dirname, 'dist');
+fs.mkdirSync(outDir, { recursive: true });
+
+for (const app of APPS) {
+  const srcPath = path.join(__dirname, app + '.js');
+  if (!fs.existsSync(srcPath)) {
+    console.log('SKIP:', app, '(source not found)');
+    continue;
+  }
+
+  const code = fs.readFileSync(srcPath, 'utf8');
+
+  let minified = code
+    .replace(/\/\/[^\n]*/g, '')
+    .replace(/\/\*[\s\S]*?\*\//g, '')
+    .replace(/\n\s*\n/g, '\n')
+    .replace(/^\s+/gm, '')
+    .replace(/\n/g, '')
+    .replace(/  +/g, ' ');
+
+  console.log(app + ':');
+  console.log('  Original:', code.length, 'bytes');
+  console.log('  Minified:', minified.length, 'bytes');
+
+  const minPath = path.join(outDir, app + '.min.js');
+  fs.writeFileSync(minPath, minified);
+
+  const b64 = Buffer.from(minified).toString('base64');
+  const b64Path = path.join(outDir, app + '.b64');
+  fs.writeFileSync(b64Path, b64);
+  console.log('  Base64:  ', b64.length, 'bytes');
+}