Drop the details-panel Duration toggle: Duration rows always show
integer milliseconds, matching the cell time column. Timeline labels
(Total/TTFT/Decoding) and step-group descriptions previously fell back
to second labels at or above one second; they now also show exact
milliseconds via the shared formatDurationMillis formatter.
One two-turn seed (turn 1: bash + two parallel reads in a single assistant
message; turn 2: a markdown-heavy reply) rendered cold through the
seeded-history pattern — zero model calls — serving four surfaces:
- sidebar search: client-side title filter; asserted only after the durable
title lands with the attach baseline (a cold SessionSummary carries no
title — search matches the displayTitle the user sees). Negative query
empties the tree, positive narrows to the match + its force-expanded
group, clear restores.
- Trajectory tab: turn sections, the step group's tool mix ('bash read×2'),
and a view-area aria golden.
- Waterfall tab: span stats header + one lane per span. The P-I fold counts
a turn-0 prologue span (only assistant/steering nodes carry a turn
number) — pinned as-is; real spans are P-III per the view's ledger.
- details column: the bash toolview row routes click to openDetails;
open/closed is asserted on the frame's data-details-collapsed attribute
because close collapses the grid column to width 0 without unmounting
the subtree (hidden, not absent, is the contract).
Agent Note scenario list extended in both languages; pairing re-recorded.
