The dashboard's first row becomes a 1:1 column pair: the KPI band's six
figures (three per row) beside a new last-7-days usage chart whose card
stretches to the same height. Each day pairs a billed-tokens bar (the
heatmap's blue) with its priced fee (green), folded off the merged daily
ledger and priced by the same book and estimator as the KPI cost cell —
per-turn attribution, never the session's last-active day. The plot is
framed like a chart: hairline gridlines at quarters of each series' own
peak, a solid baseline, tick rails on both sides (tokens left, cost
right, dashes while nothing prices), and a day strip mirroring the
columns' flex geometry. The pair folds to one column at 932px of
container and the KPI grid to 2x3 at 640px; the bars' box keeps a
min-height floor so percentage heights survive the folded single-column
row. The cost legend qualifies its scope (price-mapped models only)
while the tooltip line stays bare.
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