1. Removed أحجيات (puzzles) from home quick buttons — chess-only feature
2. Daily reward completely rewritten:
   - 7-day streak timeline showing claimed/today/future days
   - Each day shows reward amount (50→75→100→125→150→200→300)
   - Already-claimed state: shows ✅ with 'عد غداً' message
   - Prevents double claim (checks last_daily_reward date)
   - Coin burst + fly-to-HUD animation on claim
   - Streak badge '🔥 X يوم متتالي'
   - Info text explaining escalating rewards
   - Has back button ←
3. Challenges scene: added back button ←
4. All pushed scenes now have proper back navigation
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>