Ajoute une image de couverture sur les cards de jeu

- Champ `cover` dans lib/games.ts
- Branché sur la card home, la liste des jeux et le hero page projet
- Fallback placeholder logo si pas d'image

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

app/games/page.tsx

@@ -32,15 +32,25 @@ export default function GamesPage() {
               href={`/games/${game.slug}`}
               className="group relative aspect-[16/9] sm:aspect-[21/9] bg-surface border border-border overflow-hidden block hover:border-accent transition-colors"
             >
-              <div className="absolute inset-0 flex items-center justify-center">
+              {game.cover ? (
                 <Image
-                  src="/image/Studio/Logo Flat.png"
-                  alt=""
-                  width={140}
-                  height={94}
-                  className="opacity-15 group-hover:opacity-25 group-hover:scale-105 transition-all duration-700"
+                  src={game.cover}
+                  alt={game.title}
+                  fill
+                  sizes="(max-width: 1024px) 100vw, 1024px"
+                  className="object-cover group-hover:scale-105 transition-transform duration-700"
                 />
-              </div>
+              ) : (
+                <div className="absolute inset-0 flex items-center justify-center">
+                  <Image
+                    src="/image/Studio/Logo Flat.png"
+                    alt=""
+                    width={140}
+                    height={94}
+                    className="opacity-15 group-hover:opacity-25 group-hover:scale-105 transition-all duration-700"
+                  />
+                </div>
+              )}
               <div className="absolute bottom-0 left-0 right-0 p-8 bg-gradient-to-t from-background via-background/80 to-transparent">
                 <p className="font-display text-xs tracking-[0.3em] text-accent mb-2">
                   {statusLabel[game.status]}