Before: only delete showed a spinner/disabled buttons. Picking Done on
92 selected emails fired off 184 sequential HTTP calls (mark-answered
+ mark-read) with zero UI feedback, so it looked like the click did
nothing for the ~20-30 seconds it took to grind through.
- All five bulk actions (delete / archive / done / read / unread) now
swap the target button into a whirlpool+verb-ing state, dim siblings,
and show 'N/M…' progress in the count label that ticks as each
request resolves.
- Per-uid work runs in parallel with a hard cap of 6 in flight, so a
90-email Done finishes in ~3 server round-trips of latency instead
of 90, but we still don't open 90 simultaneous IMAP-backed connections.
5ec1e12a50