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/i18n/locales-old/de/pages/home/skills.ts

@@ -0,0 +1,41 @@
+// src/i18n/locales/de/pages/home/skills.ts
+export const skills = {
+    title: 'Fähigkeiten',
+    skills: [
+        {
+            name: 'AI & LLMs',
+            level: 90,
+            description: 'GPT-4, Claude API, Vapi Voice AI'
+        },
+        {
+            name: 'Automation',
+            level: 85,
+            description: 'n8n, Zapier, Power Automate'
+        },
+        {
+            name: 'Python',
+            level: 90,
+            description: 'Backend, APIs, Automation'
+        },
+        {
+            name: 'TypeScript',
+            level: 85,
+            description: 'React, Next.js, Node.js'
+        },
+        {
+            name: 'Datenbank',
+            level: 85,
+            description: 'PostgreSQL, Supabase, MariaDB'
+        },
+        {
+            name: 'DevOps',
+            level: 75,
+            description: 'Docker, Vercel, Dedicated Servers'
+        }
+    ],
+    aria: {
+        skillLevel: 'Fähigkeitsniveau',
+        selectSkill: 'Fähigkeit auswählen'
+    }
+} as const;
+export type SkillsTranslations = typeof skills;