text_thread: Improve roles after `assistant::Split` (shift-enter) (#33215)
Default to `You` when triggering `assistant::Split` at the end of a thread
Release Notes:
- agent_thread: Improved roles when triggering `assistant::Split`
(`shift-enter`)
2a5a1814cdPeter Tripp committed on 6/25/2025, 5:26:24 PM· committed by GitHubparentcc62125