Game menu popup overhauled:
- Header: game icon (gradient square) + name + close button
- Main buttons (.gm-btn): 52px icon, bold title, subtitle, arrow indicator
  - 'لاعب واحد' with gamepad icon on game gradient
  - 'أونلاين' with swords on red/orange gradient
- Secondary grid (.gm-chip): vertical icon + label, full tap target
  - الترتيب, مبارياتي, أحجيات (chess only)
- All buttons: dark card style with border, scale-on-press, no web-form feel
- Removed old .menu-btn / .feature-chip CSS entirely
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>