thread_view: Adjust empty state and error displays (#36774)
Also changes the message editor placeholder depending on the agent.
Release Notes:
- N/A
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Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>
639417c2bcDanilo Leal committed on 8/22/2025, 8:40:52 PM· committed by GitHubparent896a35f