The add and edit surfaces could be scrolled sideways and the time picker
sat past the right edge: measurements, mood, the medication intake editor
and the cycle log sheet all showed it, so the cause is in what they share.
Two mechanisms, both in shared primitives.
DateField and TimeField wrap a text input. A flex item's min-width:auto
resolves to a content-based minimum, and for a text input that is its
intrinsic size attribute — 20 characters, about 180px. Neither field could
render below ~230px whatever width the parent offered, so the date + time
row demanded ~470px inside a 400px dialog body and pushed the clock button
58px past the edge. min-w-0 on the field box and on the overlay input
releases that floor; the row now fits at every width from 360px up.
The scrolling body only declares overflow-y. CSS promotes the other axis
from visible to auto, so every deliberate outward bleed in the tree turned
the form into a pannable surface — SheetSection's trigger row was 8px wider
than its own container for no benefit (a focus ring already draws outside
the box), and Switch's hit-target pseudo reaches 13px past the track. The
bodies and the dialog surface now state overflow-x explicitly, the section
trigger no longer bleeds, and the dialog's grid column is pinned so an
over-wide child cannot drag the surface out with it.
Measured before and after on the four reported surfaces at 360 / 390 / 430
/ 768 / 1280 / 1440: the date/time row spilled 83px on every width from
640px up and none of it remains.
An e2e spec asserts the two harms directly — the surface is not a
horizontal scroll container, and no focusable control lies outside its
visible box — with a canary that proves the reachability check can fail.
One-shot prettier pass so the new format:check gate starts from a clean
baseline. Formatting only — no behaviour change. Generator-owned and
vendored artifacts stay untouched via .prettierignore.
Marc-André Bombeck