Caught by the visual suite, not predicted: at 360px the Picker's new
search row laid itself out at 366px inside a 328px column and pushed the
submit button off-screen, taking the document's scrollWidth to 382.
Both defaults involved resolve to a min-content minimum: an implicit grid
track (`auto`) and a flex container (`min-width: auto`). Neither will
shrink below the row's min-content, so the input's `flex: 1; min-width: 0`
never got the chance to give the button room. `minmax(0, 1fr)` on the
track and `min-width: 0` on the row are the same pair
`.studio-editor-layout` already needs one file over.
`.studio-asset-tools` gets the guard too -- the Library's search row has
the identical structure and no visual golden watching it. Verified in
Chromium at 360 and 1440 on both routes: scrollWidth equals the viewport
and no element extends past it.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
