Saving panels replaces the whole list, so the spec's setup deleted every
panel it had not created — and with it the credential of the screen on
it. It now appends to the stored list and puts the original back in
teardown, which also removes its own panel.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013Gf7WaExcJ9bs3kfJXB3nK