The insights sub-page shell (text-xl sm:text-2xl semibold), the
medication detail, the check-in screen and its result (semibold) each
read a step lighter than every other page title. They now render
through PageHeader, which gains a focusable heading with a visible ring
for screens that move focus to their title, and an accessory slot
beside the H1 that stays outside its accessible name. A structural test
lists where a different H1 is the point (heroes, sign-in, error and
prose pages, the first-run steps) and refuses any other.