Better backtest day pages

The per-day backtest view is clearer and more useful: stat pills up top, order markers on the chart, a cumulative equity curve, and P&L through the close, with tidier ledger columns.

When you drill into a single day of a backtest, you want to take it in at a glance and then be able to dig in. We reworked that per-day view to do both better.

Up top is a row of stat pills with the day's key figures. The chart now marks each order where it landed, numbered in sequence, so you can follow exactly when the strategy acted — and a cumulative equity curve traces how the position's value moved through the session and where it stood at the close. Below, the strategy's log and the trade ledger read more cleanly: tidier columns, placements and fills shown inline with their legs and prices, and no separate table to scan twice.

Together it makes a single day easy to read — what the strategy did, when, and what it came to by the close.