Groups, Pledges, and Campaigns each shipped a different author
treatment in their card footers: groups used a raw <img> with no
fallback, campaigns had no avatar at all, and pledges localized the
'by X' string while the others left it as a hardcoded English literal.
Extract AuthorByline as the canonical author element. It uses the
shadcn Avatar primitive (initials fallback), resolves the display name
through the centralized getDisplayName helper, and links to the
author's profile via useProfileUrl. The 'by Name' label is sourced
from the shared common.byAuthor i18n key so every surface ships the
same translated string in every locale.
Inside a card, the byline renders as a <button> that navigates and
stops propagation so the outer card <Link> keeps wrapping the whole
card without nesting <a> inside <a>.
CampaignCard also picks up a localized donor count via the new
common.donors plural key, replacing the inline English 'donor' /
'donors' ternary.
Chad Curtis
b0130a66ea