* fix(chat): stop crash when expanding reasoning card with Show full
ReasoningCard applied heightIn(max = Dp.Unspecified) once "Show full"
was tapped. Inside a LazyColumn item the main axis is unbounded, so the
verticalScroll was measured with an infinite max height and Compose threw
IllegalStateException on the next layout pass.
When Show full is active the scroll wrapper is dropped entirely and the
trace renders at its natural height (legal inside a LazyColumn item).
Regression test reproduces the crash path: ReasoningCard in a LazyColumn
item, expand, Show full, collapse.
* test(chat): scroll to the reasoning toggle before asserting it
The card grows taller than the viewport after Show full, so the Show
less button sits below the fold. performScrollTo brings it on-screen
before the assert and the follow-up click.
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Co-authored-by: M57 <hy4ri@users.noreply.github.com>
