Since the Brain2 update, two features I relied on in the Brain chat interface are no longer available: the ability to regenerate a Brain response, and the ability to edit a previously sent message. Both were present in the original Brain chat and helped me iterate on prompts without starting a new conversation. If these were intentionally removed, I'd like to formally request they be reinstated. If this is a phased rollout or a known gap, any timeline or workaround would be appreciated.