Chat: A lot of jitter when streaming responses

[joaomoreno]

Testing #303127

A rogue Working affordance hides/shows randomly, which causes unnecessary jitter.

Screen.Recording.2026-03-23.at.12.16.17.mov

[justschen]

edit: i mentioned the wrong one, this might be worth merging a fix today. taking a look atm.

seems to only really happen with CLI