- Add StrategyCard component with icon, CAGR range, risk badge, and stock count
- Update strategy list page with improved cards and descriptions
- Redesign backtest page with split layout (form left, results right)
- Add summary cards for CAGR, MDD, Sharpe ratio, and total return
- Integrate charts for equity curve, drawdown, and yearly returns
- Add badge, select, and skeleton UI components
- Toggle between new backtest form and history view
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>