The compose FAB does not render reliably under a never-completing refresh==Loading pager (flaked as not-displayed, not-found, then waitForText-timeout across CI runs). Drop the positive FAB anchor; assert only mailbox_empty.assertDoesNotExist() — the actual #219 gate behavior, which is stable and idle-completes. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>