feat: implement high-priority SEO fixes and German localization

src/app/(marketing)/tools/crypto-qr-code/CryptoGenerator.tsx

@@ -14,6 +14,7 @@ import { Button } from '@/components/ui/Button';
 import { Input } from '@/components/ui/Input';
 import { Select } from '@/components/ui/Select';
 import { cn } from '@/lib/utils';
+import AdBanner from '@/components/ads/AdBanner';
 
 // Brand Colors
 const BRAND = {
@@ -351,6 +352,20 @@ export default function CryptoGenerator() {
                 </div>
             </div>
 
+            {/* Leaderboard Ad - Below Form */}
+            <div className="mt-12 mb-12">
+                <div className="text-center text-xs text-slate-400 mb-2 uppercase tracking-wider">Advertisement</div>
+                <div className="flex justify-center bg-slate-50 rounded-xl p-4 border border-slate-100">
+                    {/* @ts-ignore */}
+                    <ad-banner
+                        data-ad-slot="leaderboard-slot-id"
+                        data-ad-format="auto"
+                        full-width-responsive="true"
+                        className="w-full max-w-[728px]"
+                    />
+                </div>
+            </div>
+
             {/* Upsell Banner */}
             <div className="mt-8 bg-gradient-to-r from-slate-900 to-slate-700 rounded-2xl p-6 flex flex-col sm:flex-row items-center justify-between gap-4">
                 <div className="text-white text-center sm:text-left">