feat(home): image-led featured projects section

Bring imagery to the homepage projects block (Phase 3), matching the portfolio
gallery.

- Thread coverImagePath through ProjectCardCopy and the home mapping.
- Rewrite ProjectsSection as image-first cards (reusing PortfolioCover with the
  branded placeholder fallback): whole-card link, featured project spans two
  columns with a larger cover, type-scale title, meta + stack badges, hover
  lift. Replaces the previous text-only cards.

Verified: eslint clean; no new type errors (pre-existing Prisma-gen anys only).

app/[locale]/(site)/page.tsx

@@ -180,6 +180,7 @@ export default async function HomePage({ params }: HomePageProps) {
       String(project.projectYear),
     ],
     featured: index === 0,
+    coverImagePath: project.coverImagePath,
   }));
 
   const fallbackProjectCards: ProjectCardCopy[] = projectsCopy.fallbackItems.map((item) => ({