One card per campaign: name, who and where, one "what happens next" line, four numbers. Everything else is one click in, on the campaign's own page. The capacity bar is expansion-suggestion.ts: about 5 mailboxes keep one campaign busy at 15/day (MAILBOXES_PER_CAMPAIGN), so 20 mailboxes on one campaign is idle capacity. The queued card is Relay's depletion suggestion.