Trade attribution panel + active return / tracking error pills

Headline backtest stats answer "did the strategy work" but not "where did the return actually come from". The new trade-attribution panel breaks the equity curve down by trade, ranking the largest contributors and detractors so you can see whether your CAGR is being carried by three lucky trades or by a broad base.

Three new pills appear next to Sharpe and CAGR on every result card: active return (vs benchmark), tracking error, and information ratio. Together they tell you whether the strategy actually beat its benchmark per unit of relative risk taken — not just whether the absolute number looks good.

If you've been wondering whether your favourite backtest is genuinely diversified or quietly concentrated in a few outliers, the attribution panel is the first place to look.