Seven cookies removed across the container-card rendering code (4
#398, 3 #432). All point at existing docs/web-ui.md::Container row
prose (rebuild_queue building badge, stopped-container state
clearing). Each comment shrinks to either a short docs ref or just
drops the cookie where the substantive content already explains
itself.
Net ±0 lines in tabs.js (rewrites are similar length); the win is
each comment now reads as 'what this code does' rather than 'why
PR #N decided this'. tabs.js is now at 48 #NNN refs (down from
55 at start of this batch, 73 at start of the milestone).
refs #712, builds on #722 + #724 + #728
4c30b52e48