Setup card, start button and guide were three `shrink-0` siblings, so they took
whatever height they wanted and nothing could scroll past them. The guide carried
its own `overflow-y-auto`, which never once engaged — `shrink-0` had already given
it its full natural height, so there was nothing to overflow.
Fine at 100%, and the panel system is zoomable. At 120% the setup ran off the
bottom of the panel with no way to reach it, which is the zoom somebody uses
precisely because they want to read it.
So the scroller moves up to where the height is actually constrained, and the
composer keeps `shrink-0` before the first message so it stays pinned at the
bottom whatever the zoom.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
pastilhasandClaude Opus 5
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