Making Typefaces one row equalised the two tabs by luck, not by construction — the labels and the hints
under the selects still differed, and any tab that grows a row would put the jump straight back.
So every panel now sits in the SAME grid cell. The block is as tall as the tallest of them and stops
moving entirely, and it stays right when a tab is added or one of them grows.
Measuring instead would have meant a ResizeObserver, a re-measure after every edit, and a wrong answer
for one frame after each. `col-start-1 row-start-1` gets the same number out of the layout engine for
nothing.
`invisible`, not `hidden`. An invisible element still takes its space, which IS the mechanism — and it
is out of the tab order, so the controls behind the front panel cannot be reached by keyboard. The Tabs
root is controlled now, because visibility is decided here rather than by Radix unmounting.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
pastilhasandClaude Opus 5
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