Adds a day-over-day view so the bot's per-day record is comparable at a glance.
query_daily_performance returns one row per NYSE trading day {date, day_pnl
(broker equity delta), cum_pnl, realized, trades, win_rate, equity} — account
summaries (EOD equity) joined to the closed-trade journal; weekend/holiday
mark-drift on held positions is filtered out (trading days only). Wired into the
snapshot as `daily`.
Dashboard panel renders it as a waterfall: the blue line is the cumulative P&L
(the equity curve), each bar is that day's step (green up / red down) on one
shared scale. Hover shows date/day-P&L/trades/win%; click a day to open its full
view; the currently-viewed day is highlighted.
Tests: trading-days-only filter + cumulative math. Headless-verified (4 days
render, click-to-open switches the view); no JS errors.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
