Combined footer overhaul:
- Per-CMS-page show_in_footer toggle (#441) — admins can hide
Impressum / Datenschutz from the gallery footer when an external
privacy / imprint URL is enough.
- Five social-media URL fields in branding settings (#441) — Facebook,
Instagram, WhatsApp, X/Twitter, YouTube. Empty string hides each
icon individually; the row is omitted when none are set.
- Promotional banner slot above or below the gallery footer (#440) —
global default authored as markdown in branding settings, plus a
three-way per-event override on the Edit Event form
(inherit / custom / off). Backend nulls promo_markdown automatically
when mode != 'custom' so stale text never persists.
Sanitization: marked with gfm/breaks → DOMPurify with a tight
allowlist (no img, no tables, no inline html). Post-process forces
target=_blank rel="noopener noreferrer nofollow" on every link so
admin-set URLs can't tab-nap the gallery context.
i18n covers all six locales (en/de/nl/pt/ru/fr).
Targets the beta branch.
Paul Nothaft
3a731e7c95