agent_ui: Add debug command to copy and paste agent threads (#48039)

Temporary feature meant to aid with internal performance debugging

Release Notes:

- N/A *or* Added/Fixed/Improved ...
3d7fe6e1f8Lukas Wirth committed on 1/30/2026, 6:07:08 PM· committed by GitHubparent3723a25
3 files changedLine totals unavailable