Improve thread message history (#34299)

- Keep history across threads
- Reset position when edited

Release Notes:

- N/A

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Co-authored-by: Ben Brandt <benjamin.j.brandt@gmail.com>
d0e01dbd8fAgus Zubiaga committed on 7/11/2025, 4:24:41 PM· committed by GitHubparentd65855c
4 files changedLine totals unavailable