feat: Add professional portfolio images and Hero redesign

- Add 15 optimized WebP images for portfolio (21-53KB each)
- Redesign Hero section with full-width background image
- Add SSR support for Hero component
- Update About section with new portrait image
- Update Contact page with professional headshot
- Add images to Services/Leistungen page
- Add image optimization script (sharp)
- Update translations for gallery section

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

next.config.ts

@@ -53,8 +53,59 @@ const nextConfig: NextConfig = {
           },
         ],
       },
+      {
+        source: '/images/:path*',
+        headers: [
+          {
+            key: 'Cache-Control',
+            value: 'public, max-age=31536000, immutable',
+          },
+        ],
+      },
+      {
+        source: '/_next/static/:path*',
+        headers: [
+          {
+            key: 'Cache-Control',
+            value: 'public, max-age=31536000, immutable',
+          },
+        ],
+      },
+      // Content-Language Headers für jede Sprache (wichtig für Bing)
+      {
+        source: '/de/:path*',
+        headers: [
+          {
+            key: 'Content-Language',
+            value: 'de-DE',
+          },
+        ],
+      },
+      {
+        source: '/en/:path*',
+        headers: [
+          {
+            key: 'Content-Language',
+            value: 'en-US',
+          },
+        ],
+      },
+      {
+        source: '/sr/:path*',
+        headers: [
+          {
+            key: 'Content-Language',
+            value: 'sr-RS',
+          },
+        ],
+      },
     ];
   },
+
+  // Compiler-Optimierungen
+  compiler: {
+    removeConsole: process.env.NODE_ENV === 'production',
+  },
 };
 
 const withMDX = createMDX({