WIP: A simple cli for daily tangled use cases and AI integration. This is for my personal use right now, but happy if others get mileage from it! :)

fix: reuse valid access tokens instead of refreshing every command master

Each tang call refreshed the access token, rotating the single-use refresh token every time. If a command was interrupted or overlapped another, the stored token got revoked before the new one was saved, forcing re-auth. This reuses a still-valid cached token and only refreshes when it has actually expired. Co-authored-by: Claude (claude-opus-4-8) <noreply@anthropic.com>