Remove link to Style Guide in AdminPanel component to streamline UI preferences section.

components/admin/AdminPanel.tsx

@@ -76,11 +76,6 @@ export default function AdminPanel({ initialPreferences }: AdminPanelProps) {
               <h2 className="text-xl sm:text-2xl font-gaming font-bold text-pixel-gold break-words">
                 Préférences UI Globales
               </h2>
-              <Link href="/admin/style-guide" target="_blank">
-                <Button variant="primary" size="sm">
-                  📖 Voir le Style Guide
-                </Button>
-              </Link>
             </div>
             <div className="space-y-4">
               <BackgroundPreferences initialPreferences={initialPreferences} />