Migrate from Vite to Next.js 15 with SSR

- Replace Vite + React Router with Next.js 15 App Router
- Implement i18n with next-intl (URL-based: /de, /en, /sr)
- Add SSR/SSG for all pages (48 static pages generated)
- Setup Supabase SSR client for auth
- Migrate all pages: Home, About, Portfolio, Blog, Contact, Login, Dashboard, Imprint, Privacy, Terms
- Add Docker support with standalone output
- Replace i18next with next-intl JSON translations
- Use next/image for optimized images

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

src/components-vite/TestimonialCard.tsx

@@ -0,0 +1,51 @@
+import React from 'react';
+import { Star, Quote } from 'lucide-react';
+import ImageWithFallback from './ImageWithFallback';
+
+interface TestimonialProps {
+  name: string;
+  role: string;
+  company: string;
+  image: string;
+  content: string;
+  rating: number;
+}
+
+const TestimonialCard: React.FC<TestimonialProps> = ({
+  name,
+  role,
+  company,
+  image,
+  content,
+  rating
+}) => {
+  return (
+    <div className="bg-gray-900/50 p-6 rounded-xl relative">
+      <Quote className="absolute top-4 right-4 h-8 w-8 text-orange-500/20" />
+      <div className="flex items-center space-x-4 mb-4">
+        <ImageWithFallback
+          src={image}
+          alt={name}
+          className="w-12 h-12 rounded-full"
+          loading="lazy"
+        />
+        <div>
+          <h3 className="font-semibold">{name}</h3>
+          <p className="text-sm text-white/60">{role} at {company}</p>
+        </div>
+      </div>
+      <div className="flex mb-4">
+        {[...Array(5)].map((_, i) => (
+          <Star
+            key={i}
+            className={`h-4 w-4 ${i < rating ? 'text-orange-500' : 'text-gray-600'}`}
+            fill={i < rating ? 'currentColor' : 'none'}
+          />
+        ))}
+      </div>
+      <p className="text-white/80">{content}</p>
+    </div>
+  );
+};
+
+export default TestimonialCard;