Manage registrations, Users, Events and Reports: save the current filters under a name, apply one with a click, star one as the default for the page (not applied over a deep link). Per person, stored on the server, removed when an account is anonymised. /api/saved-filters. Migration 20261028180000_saved_filters. Completes roadmap section 9. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>