Settings › Date format steered every date the app printed, but not one it
asked for: `<input type="date">` renders in the browser's own locale and no
page setting can move it, so DD-MM-YYYY tables sat above 08/22/2026 boxes.
DateField takes over the typing half — a masked box whose segment order comes
from the same prefs.dateFormat lib/format.js reads — and leaves the picking
half to the browser, behind a calendar button. The value in and out stays ISO,
so no caller changed. Native validation now also catches a full-but-impossible
date; the old input let a half-typed one through as no date at all.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
