The timing card gains a bottom band that reads where the session's ACTIVE
time went: every completed step's slices — the TTFT wait, the decode blocks
in stream order, the tool-run windows, and the in-step residue — packed
gapless in occurrence order, each band's width its share of the cumulative
active time (idle time between steps takes no track), with ticks at zero,
the quartiles, and the full span.
Host: the fold tiles each step at step/end (clamped into the step window,
first-wins de-overlap so parallel runs paint their union, holes filled with
the residue kind) into a new spans collection — bounded to the newest 2,000,
riding the detail channel and the inline view, never the slim head. The
decode window anchors at the first OBSERVABLE instant (the first token, or
an earlier block marker the token packing could not stamp), so a redacted
reasoning block keeps its span instead of being swallowed by the wait.
stateVersion 22 → 23: the per-step collection cannot be backfilled by later
events, so cached rows refold from the durable log.
Client: the strip joins the card's hover link by KIND — a band hover lights
every span of its kind plus the donut arc and the legend row, and the
floating tip answers only the strip's own pointer (the mirror rule).
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