perf: enable static generation and optimize images for 100/100 lighthouse

app/[locale]/page.tsx

@@ -37,6 +37,41 @@ const mdxComponents = (references: any[]) => ({
   AnimatedCounter,
   InteractiveGermanyMap,
   ScaleOfImpact,
+  ResponsiveImage: (props: any) => {
+    // Parse src if it's already a next image proxy
+    let src = props.src;
+    if (typeof src === 'string' && src.startsWith('/_next/image')) {
+      try {
+        const urlParam = new URLSearchParams(src.split('?')[1]).get('url');
+        if (urlParam) src = decodeURIComponent(urlParam);
+      } catch (e) {
+        // Fallback
+      }
+    }
+    
+    // Use Next.js getImageProps for responsive srcSet generation
+    const {
+      props: { srcSet, src: finalSrc, sizes }
+    } = getImageProps({
+      src,
+      alt: props.alt || '',
+      width: 1920,
+      height: 1080,
+      sizes: '(max-width: 768px) 100vw, (max-width: 1200px) 75vw, 50vw',
+      quality: 80,
+    });
+
+    return (
+      <img 
+        {...props} 
+        src={finalSrc} 
+        srcSet={srcSet}
+        sizes={sizes}
+        loading="lazy" 
+        decoding="async" 
+      />
+    );
+  },
   img: (props: any) => {
     // Parse src if it's already a next image proxy
     let src = props.src;