The provenance token (abgeleitet/kuratiert) was nested inside the
{#if dateLabel} block, so an undated or UNKNOWN-precision event — e.g.
one in the undated bucket — rendered no provenance at all. Compose the
subtitle as an optional "{date} · " prefix in front of the always-present
provenance instead.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>