Add a reasoning-only /statusline item

What variant of Codex are you using?

Codex CLI / TUI

What feature would you like to see?

I would like /statusline to support a reasoning-only item, separate from the existing model and model-with-reasoning items.

Right now I can show:

[tui]
status_line = ["model"]
# or:
status_line = ["model-with-reasoning"]

But there does not appear to be a way to hide the model name while still showing only the current reasoning level.

For example, I would like to configure something like:

[tui]
status_line = ["reasoning"]

and have the footer show values like:

low
medium
high
xhigh
default

This would be useful for users who already know what model they are running (eg im always on flagship), or want a less noisy footer

Additional information

_No response_