- [x] Remove "Mo" option from duration — keep only minutes and pages
- [x] Combine pages and minutes as separate fields (both can be set simultaneously)
- [x] Fix minutes input visibility (can't see what's typed)
- [x] Add `has_annexes` checkbox to form + DB column
- [x] Display duration on admin backoffice recap page
- [x] Update public TFE page duration display for new combined format