- Fix streak signal: was giving 100% to streak chair after normalization
(non-streak chairs were 0), now properly distributes probability with
streak chair getting less as streak grows (actual mean reversion)
- Change recent window from 20 to 50 games
- Reweight signals based on backtest: base_rate 0.15→0.20 (best performer),
recent 0.10→0.15, streak 0.10→0.05, balance 0.15→0.10
- Move Live Market Sentiment above Signal Breakdown