feat: implement high-priority SEO fixes and German localization

src/components/marketing/InstantGenerator.tsx

@@ -8,6 +8,7 @@ import { Input } from '@/components/ui/Input';
 import { Button } from '@/components/ui/Button';
 import { Badge } from '@/components/ui/Badge';
 import { calculateContrast } from '@/lib/utils';
+import AdBanner from '@/components/ads/AdBanner';
 
 interface InstantGeneratorProps {
   t: any; // i18n translation function
@@ -276,6 +277,16 @@ export const InstantGenerator: React.FC<InstantGeneratorProps> = ({ t }) => {
             </div>
           </motion.div>
         </div>
+
+        {/* Leaderboard Ad */}
+        <div className="mt-16 max-w-4xl mx-auto">
+          <div className="text-center text-xs text-gray-400 mb-2 uppercase tracking-wider">Advertisement</div>
+          <AdBanner
+            dataAdSlot="leaderboard-slot-id"
+            dataAdFormat="auto"
+            className="bg-white rounded-xl p-4 border border-gray-100 shadow-sm min-h-[90px]"
+          />
+        </div>
       </div>
     </section>
   );