- Dokument-Vorlagen-Editor: create/edit/reset document templates (admin) - Upload-Portal: public portal for Nachweis uploads via token - Onboarding: invite Destinatäre via email with multi-step wizard - Bestätigungsschreiben: preview and send confirmation letters - Email settings: SMTP configuration UI - Management command: import_veranstaltung_teilnehmer for bulk participant import Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>