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/en/pages/about/hero.ts

@@ -0,0 +1,33 @@
+export const hero = {
+    // Navigation/Header
+    aboutMe: 'ABOUT ME',
+    // Main Section
+    title: 'Digital Solutions Expert',
+    description: 'With a background in software development and expertise in digital transformation, I help companies optimize and automate their processes through innovative solutions.',
+    // Expertise Areas
+    expertise: {
+        processAutomation: {
+            title: 'Process Automation',
+            description: 'Development of efficient automated workflows'
+        },
+        systemIntegration: {
+            title: 'System Integration',
+            description: 'Connection and optimization of business systems'
+        },
+        customDevelopment: {
+            title: 'Custom Development',
+            description: 'Creation of tailored software solutions'
+        }
+    },
+    // Languages
+    languages: {
+        english: 'English',
+        serbian: 'Serbian',
+        german: 'German',
+        french: 'French',
+        spanish: 'Spanish',
+        russian: 'Russian'
+    }
+} as const;
+// Type for type safety
+export type HeroTranslations = typeof hero;