Old links still work after you rename a show.

Episodes have editable URL slugs. Rename the slug and old links redirect to the new one. So if you engrave 'AS-007' and the slug is as-007, you can change it to 'challenge-coin-emerald' and old shares redirect to the right page.

This solves the broken-link problem. Before, a slug was locked at create time. Now you can fix a typo or make the URL more readable, and nobody's old share breaks.

The system keeps alias records, so search engines see the redirect and update their index.