Gives the stepped backup-progress and restore-progress modals in the
backups view the same full-screen black, big-text, Atum-coloured
progress-bar look as the view=runbackup screen, so every backup progress
surface matches.
- New media/css/backup-progress.css: black is scoped to .msb-progress-modal
(not html/body), reuses the runbackup .msb-rb-progress/.msb-rb-bar bar with
animated/success/danger states.
- Registered com_mokosuitebackup.backup-progress asset; loaded in the backups
view via addStyleSheet (useStyle does not emit for this component).
- Both modals: full-screen dialog, big heading, big status text, shared bar.
- setBarState() drives animated -> green(complete)/red(fail) for both bars.
Claude-Session: https://claude.ai/code/session_01WbGBN9VyRK61zczYWcCQ2i
jmiller