Restores main features dropped by the policy replay: #8569 theme wiring,
#8850 composer banner follow-ups, #8855/#8904 composer fixes, #8831
settings search rework, #8803 workspace-mutation refresh (v2-adapted),
#8840 circle-alert, #8584 codex artifact templates, #8688/#8807/#8936
video + image previews (web and mobile, v2-adapted), #8862 Expo glass,
and the round's docs. Timeline thinking rows (#8984) stay on the v2
work-live system.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>