Home screen:
- 3 widget buttons above game tiles: ⚡ التحديات | 🎖️ الموسم | 🎁 هدية
- Challenges button → daily-challenges scene
- Daily reward button → daily-reward scene

Social tab:
- Added '📰 أخبار' (Activity) as 4th tab
- Activity tab loads friend timeline from activity API
- Shows actions with Arabic labels and relative timestamps

All features now accessible from UI:
- Daily Challenges: Home → ⚡ button
- Battle Pass: Home → 🎖️ button (placeholder)
- Daily Reward: Home → 🎁 button
- Activity Feed: Social tab → أخبار tab
- Rank tiers: Profile → rating section (logic ready)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>