- Classifier: book threshold reduced from 5 to 2 full moves (was classifying
  everything as book in short games, resulting in 0% accuracy)
- Friends empty state: shows friendly illustration + 'invite friends' CTA button
  instead of hostile 'لا توجد بيانات' on black void
- Profile: always fetches fresh data from API on mount (fixes stale rating
  showing 1200 after playing rated games)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>