- Add virtual MASTER arrangement to all songs (read-only, shows all groups in song order, clonable)
- Fix drop zone staying open after slide upload and thumbnail 403 (double slides/ path)
- Add click-to-preview overlay with download button, prev/next navigation, and slide counter
- Add X delete button with confirmation dialog and hover tooltip preview on agenda thumbnails
- Fix arrangement select not updating after add/clone (emit + re-fetch pattern)
- Move InformationBlock below agenda; announcement row scrolls to it instead of showing upload
- Create storage symlink (public/storage -> storage/app/public)
- Replace card-based agenda layout with a 6-column table (Nr, Zeit, Dauer, Titel, Verantwortlich, Aktionen)
- Fix isHeaderType to only match type=header, not all non-song items
- Format start time from ISO 8601 to HH:MM (Europe/Berlin)
- Format duration from seconds string to H:MM
- Fix responsible parsing for CTS data structure ({text, persons[{person:{title}}]})
- Move unmatched song search/assign UI into ArrangementDialog popup
- Add colored row backgrounds (song/sermon/announcement/slides) with left border
- Invert header rows to dark grey background with white text
