fix: detect Codex in nested ChatGPT macOS app bundle

[wsgxy986]

Summary

• what changed?
• why does it matter?

Validation

• pnpm check
• pnpm typecheck
• pnpm test

Change Surface

• apps/cli public CLI or help output
• tree onboarding / binding / inspection behavior
• shipped or planned skill topology
• docs or contributor-facing repository metadata
• CI / packaging / release plumbing

Notes

• package or install behavior changes:
• docs or tests updated to match:
• follow-up work:

[github-actions]

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