Replace CSS grid with the original plugin's vertical list + 23px margin
bracket system. Each card has a 2px border coloured by booking status;
data-previous-status / data-next-status drive C-bracket pseudo-elements in
the 23px gutter; data-spans-previous/next remove the corresponding border
and collapse the margin to extend the card across days.
Card interior is restructured: header row (room number, flow badge, lock,
nights counter, site-status pill), guest info row, and stats row (time
pill, bed-type pill, task-status bordered pill). Category headers now match
the original's sticky bordered style with edge-extending pseudo-elements.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>