You'll notice
Model picker no longer shows a "Comment on N selected lines" placeholder message
What
The model picker's keyboard shortcut handler used to show a placeholder message like "Comment on N selected line(s)..." when it detected a diff selection. That logic has been removed, and the picker now always shows a plain default placeholder instead.
Why
This removes a context-specific placeholder from the model picker, so it no longer reflects a selected diff range when choosing a model.