* feat(native-chat): one queue header that becomes the pause row; no composer Resume or send dialog
The queued cards now sit under one header row on desktop and phone: "Queued"
and the count normally, and "Paused" with the count, Clear all and Resume
while the host holds the queue after a Stop. A chevron folds only the cards;
the choice is local to the view and resets when the queue empties.
The composer's Send no longer turns into a second Resume, and a message sent
into a paused queue no longer asks "Send message?": it sends, its accepted
turn lifts the pause, and the cards follow it. Clear all deletes every card
through the existing per-card delete. No wire or host change.
* test(mobile): find the background-tasks strip's toggle inside the strip, not the queue header's
* Make queued Clear all atomic across clients
* Show queued message failures in collapsed headers
* Use per-card delete for paused queue Clear all
* Join repeated paused queue Clear actions