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/ScrollAnimation.tsx

@@ -0,0 +1,44 @@
+import { motion, useAnimation } from "framer-motion"
+import { useEffect, useRef } from "react"
+
+interface ScrollAnimationProps {
+    children: React.ReactNode
+    delay?: number
+}
+
+const ScrollAnimation: React.FC<ScrollAnimationProps> = ({ children, delay = 0 }) => {
+    const controls = useAnimation()
+    const ref = useRef<HTMLDivElement>(null)
+
+    useEffect(() => {
+        const observer = new IntersectionObserver(
+            ([entry]) => {
+                if (entry.isIntersecting) {
+                    controls.start({ opacity: 1, y: 0, transition: { duration: 0.5, delay: delay } })
+                }
+            },
+            {
+                threshold: 0.5,
+            },
+        )
+
+        if (ref.current) {
+            observer.observe(ref.current)
+        }
+
+        return () => {
+            if (ref.current) {
+                observer.unobserve(ref.current)
+            }
+        }
+    }, [controls, delay])
+
+    return (
+        <motion.div ref={ref} initial={{ opacity: 0, y: 20 }} animate={controls}>
+            {children}
+        </motion.div>
+    )
+}
+
+export default ScrollAnimation
+