A video has no width rungs — poster-448.webp and friends are cut from a still —
so asking for 320.webp returns a 404 and the grid drew a broken tile with no clue
why. Every grid in the panel was doing it, and a carousel is explicitly allowed
to hold both kinds.
posterUrl already existed for this and nothing called it. mediaThumbUrl decides
from the extension so a screen showing mixed media does not have to know the
difference.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
pastilhasandClaude Opus 5
55be0a1860