Finish a cloud page copy when the page lands late; stop it on a switch

Astra's review:
- "+" checked once for the new page's ack, so a busy queue or a dropped
  connection meant the page landed later, empty, with nothing said. It
  now waits for the page within the three seconds, keeping the queue
  sending; past them the copy follows once the page lands, and a toast
  says the page is on its way.
- Copies queue through the queue of the strategy open now, so leaving
  the strategy while one was copied sent the rest to the wrong one. Each
  copy now checks the strategy first, and a stopped copy says so.
- The three seconds didn't cover the send or the image picture copies.
  They now bound everything; an image that takes longer is left out.
- Lineup copy ids skipped the storage-length check items get.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
0cc36a727bDara Adedeji committed on 10/10/2026, 5:33:44 PMparentb286bbb
6 files changedLine totals unavailable