chore: ui: add a terminal check

[jennijuju]

Related Issues

#12247 (comment)

Proposed Changes

Additional Info

Checklist

Before you mark the PR ready for review, please make sure that:

• Commits have a clear commit message.
• PR title is in the form of of <PR type>: <area>: <change being made>
  • example: fix: mempool: Introduce a cache for valid signatures
  • PR type: fix, feat, build, chore, ci, docs, perf, refactor, revert, style, test
  • area, e.g. api, chain, state, mempool, multisig, networking, paych, proving, sealing, wallet, deps
• Update CHANGELOG.md or signal that this change does not need it.
  • If the PR affects users (e.g., new feature, bug fix, system requirements change), update the CHANGELOG.md and add details to the UNRELEASED section.
  • If the change does not require a CHANGELOG.md entry, do one of the following:
    • Add [skip changelog] to the PR title
    • Add the label skip/changelog to the PR
• New features have usage guidelines and / or documentation updates in
  • Lotus Documentation
  • Discussion Tutorials
• Tests exist for new functionality or change in behavior
• CI is green

[jennijuju]

cc @ribasushi

[ribasushi]

@rvagg @jennijuju this should land in master soon - it makes the already-in-master #12247 safer.