- Replace broken icon-only sidebar collapse with off-canvas hamburger menu
that slides in from left (hidden by default on <768px)
- Add sidebar overlay backdrop, auto-close on nav/logout
- Rename 'Cantaloupe Sync' to 'Import' in sidebar and 'Excel Import' in page
- Remove 'Sync Now' button and backend subprocess auto-export entirely
- Keep manual Excel file upload as the only import path
- Update empty-state text and upload handler to work without Sync Now btn
Leo
cd1f04a519