chore(ui): regenerate activity baselines after rebasing onto #313

#313 (the pending-work queue) merged to main first and added a nav-bar
button that appears in the sticky header on every page, including Activity -
so rebasing wave-1-bottleneck onto the new main made this branch's own
activity.spec.ts baselines doubly stale (missing the nav button on top of
already missing the Bottleneck tile). Took main's PNGs wholesale during the
rebase conflict, then regenerated via `just visual-update` scoped to
activity.spec.ts so light/dark now show the queue nav icon and the
Bottleneck tile together. query failure unchanged (no visible delta there).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019xKUm9vH4ifb5LHR5szy1v

Author: pmaxhogan