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>

src/components/portfolio/PortfolioCard.tsx

@@ -0,0 +1,125 @@
+'use client';
+
+import Link from 'next/link';
+import Image from 'next/image';
+import { motion } from 'framer-motion';
+import { ExternalLink, Calendar, Tag } from 'lucide-react';
+import { useLocale, useTranslations } from 'next-intl';
+
+interface Project {
+  slug: string;
+  title: string;
+  description: string;
+  excerpt?: string;
+  technologies: string[];
+  category?: string;
+  date?: string;
+  featured?: boolean;
+}
+
+interface PortfolioCardProps {
+  project: Project;
+}
+
+const PortfolioCard = ({ project }: PortfolioCardProps) => {
+  const locale = useLocale();
+  const t = useTranslations('portfolio.ui');
+  const displayTags = project.technologies;
+
+  return (
+    <Link
+      href={`/${locale}/portfolio/${project.slug}`}
+      className="group relative block bg-zinc-900/50 backdrop-blur-sm
+               rounded-xl shadow-lg hover:shadow-2xl
+               ring-1 ring-zinc-800 hover:ring-zinc-700
+               transition-all duration-500 focus:outline-none focus:ring-2
+               focus:ring-zinc-600 focus:ring-offset-2 focus:ring-offset-zinc-950
+               transform hover:-translate-y-1"
+    >
+      <motion.div
+        initial={{ opacity: 0, y: 20 }}
+        whileInView={{ opacity: 1, y: 0 }}
+        viewport={{ once: true }}
+        transition={{ duration: 0.5 }}
+        className="relative overflow-hidden rounded-xl"
+      >
+        {/* Image Container */}
+        <div className="aspect-[16/9] w-full relative overflow-hidden bg-zinc-900">
+          <Image
+            src={`/images/projects/${project.slug}/cover.jpg`}
+            alt={project.title}
+            fill
+            sizes="(max-width: 640px) 350px, (max-width: 768px) 400px, (max-width: 1024px) 550px, 400px"
+            className="object-cover transition-transform duration-700 group-hover:scale-110"
+          />
+        </div>
+
+        {/* Content */}
+        <div className="relative -mt-2 p-6 bg-zinc-900 z-10">
+          {/* Project Info */}
+          <div className="flex items-center gap-4 mb-4 text-zinc-500">
+            {project.date && (
+              <div className="flex items-center gap-2 text-sm">
+                <Calendar className="h-4 w-4" />
+                <span>{project.date}</span>
+              </div>
+            )}
+            {displayTags && displayTags.length > 0 && (
+              <div className="flex items-center gap-2 text-sm">
+                <Tag className="h-4 w-4" />
+                <span>{displayTags.length} {t('technologies')}</span>
+              </div>
+            )}
+          </div>
+
+          {/* Title & Description */}
+          <h3 className="text-xl font-semibold text-white mb-3
+                       group-hover:text-zinc-100 transition-colors duration-300">
+            {project.title}
+          </h3>
+          <p className="text-zinc-400 text-sm line-clamp-2 mb-4
+                      group-hover:text-zinc-300 transition-colors duration-300">
+            {project.excerpt || project.description}
+          </p>
+
+          {/* Tags */}
+          <div className="flex flex-wrap gap-2">
+            {displayTags.slice(0, 3).map((tag, index) => (
+              <span
+                key={index}
+                className="px-3 py-1 bg-zinc-800/50
+                         text-sm text-zinc-400 rounded-full
+                         ring-1 ring-zinc-700/50 group-hover:ring-zinc-600/50
+                         group-hover:bg-zinc-800/70 group-hover:text-zinc-300
+                         transition-all duration-300"
+              >
+                {tag}
+              </span>
+            ))}
+            {displayTags.length > 3 && (
+              <span className="text-sm text-zinc-600">
+                +{displayTags.length - 3} more
+              </span>
+            )}
+          </div>
+
+          {/* Link Icon */}
+          <div className="absolute top-6 right-6 p-2.5 rounded-full
+                        bg-zinc-800/60 backdrop-blur-sm ring-1 ring-zinc-700/50
+                        opacity-0 group-hover:opacity-100
+                        transform translate-y-2 group-hover:translate-y-0
+                        transition-all duration-300">
+            <ExternalLink className="h-4 w-4 text-zinc-400" />
+          </div>
+        </div>
+
+        {/* Subtle Hover Border */}
+        <div className="absolute inset-0 rounded-xl pointer-events-none
+                      ring-1 ring-zinc-600/0 group-hover:ring-zinc-600/30
+                      transition-all duration-500" />
+      </motion.div>
+    </Link>
+  );
+};
+
+export default PortfolioCard;

src/components/portfolio/PortfolioGrid.tsx

@@ -0,0 +1,57 @@
+'use client';
+
+import { motion } from 'framer-motion';
+import PortfolioCard from './PortfolioCard';
+
+interface Project {
+  slug: string;
+  title: string;
+  description: string;
+  excerpt?: string;
+  technologies: string[];
+  category?: string;
+  date?: string;
+  featured?: boolean;
+}
+
+interface PortfolioGridProps {
+  projects: Project[];
+}
+
+const PortfolioGrid = ({ projects }: PortfolioGridProps) => {
+  const containerVariants = {
+    hidden: {},
+    visible: {
+      transition: {
+        staggerChildren: 0.1,
+      },
+    },
+  };
+
+  const itemVariants = {
+    hidden: { opacity: 0, y: 20 },
+    visible: { opacity: 1, y: 0 },
+  };
+
+  return (
+    <motion.div
+      variants={containerVariants}
+      initial="hidden"
+      animate="visible"
+      className="grid grid-cols-1 md:grid-cols-2 gap-8"
+    >
+      {projects.map((project) => (
+        <motion.div
+          key={project.slug}
+          variants={itemVariants}
+          transition={{ duration: 0.5 }}
+          className="group"
+        >
+          <PortfolioCard project={project} />
+        </motion.div>
+      ))}
+    </motion.div>
+  );
+};
+
+export default PortfolioGrid;

src/components/portfolio/index.ts

@@ -0,0 +1,2 @@
+export { default as PortfolioCard } from './PortfolioCard';
+export { default as PortfolioGrid } from './PortfolioGrid';