Codex CLI refuses to launch if `tui` config is nonempty but doesn't contain `notifications`

What version of Codex is running?

codex-cli 0.38.0

Which model were you using?

gtp-5-codex is configured but codex doesn't launch

What platform is your computer?

Darwin 25.0.0 arm64 arm

What steps can reproduce the bug?

In config.toml set tui = { theme = { name = "dark-charcoal-rainbow" } }. (I think this was set by just-every/code.) Then run $ codex.

What is the expected behavior?

Codex ignores settings it doesn't recognize and validates settings that it does recognize, but doesn't require objects to have particular fields if those fields have a default value in the absence of the parent object. Simply having a tui config object shouldn't also require that it contain a notifications field. In particular, an empty tui object should be fine.

What do you see instead?

Error loading configuration: missing field `notifications`
in `tui`

Additional information

_No response_