One critical create journey (fill form with precision RANGE → HTTP 200 on
/zeitstrahl; the card assertion depends on #7), one security counterpart
(logged-out → 403), and one 320px no-overflow guarantee. Intentionally thin —
ci.yml does not run test:e2e today, so regression coverage lives in the
component + server specs that DO run in CI. Written, not executed locally.
Refs #781
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
