shrink links around cards refinements

[marcalexiei]

• Built on top of shrink links around cards #531

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• starlight-theme.css shrink-wraps .card-preview-link instead of every a:has(> img),
  so links around non-card images (the Vercel deploy button on the Deploy page) keep their prose layout.
• The walk is now two flat passes: collect every image, then rewrite each once.
  Nothing is spliced mid-iteration, so a copy the plugin adds is never revisited.

[vercel]

@marcalexiei is attempting to deploy a commit to the martin-mfg's projects Team on Vercel.

A member of the Team first needs to authorize it.

[martin-mfg]

so links around non-card images (the Vercel deploy button on the Deploy page) keep their prose layout.

Why do we want this? I think for the Vercel deploy button it's also an improvement if the link covers only the image itself, not the blank area to the right of it.

The only other difference I noticed is that there is now slightly less margin below linked images. Which seems fine to me. Am I missing a disadvantage here?