Managing items on the page would be a second editor for something that already
has one, and the two would drift — a caption fixed in one place and not the
other. The page chooses; the Galleries section arranges; every page using that
gallery changes with it.
The list of galleries is read from the section that owns them rather than
embedded in the home payload, because a copy there would be stale the moment
somebody edited one.
While no gallery is chosen the old per-page rows still render, and the panel says
so — a carousel that appears to come from nowhere is worse than a sentence.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>