fix(stats): cancelled bucket icon now uses semantic warning token (orange) (#1390 follow-up)
Reporter flagged that the new Cancelled row's Ban icon rendered colourless
while Successful and Failed used green/red icons in the same widget. Switch
the Cancelled icon to text-status-warning (amber-500) so all three rows now
use semantic status tokens consistently, and the colour matches the orange
Archives + notification badges already use for cancelled status.