agent_ui: Add more UI refinements to the sidebar (#51325)

Adjust the settings view and removes the new empty state from text
threads.

Release Notes:

- N/A
9d2e2c859bDanilo Leal committed on 3/11/2026, 8:34:03 PM· committed by GitHubparent9fb57b0
5 files changedLine totals unavailable