feat: implement advanced tagging system, tag weighting, and app focus refactoring

- Implemented reusable TagSelector component with i18n support
- Added tag weighting system (popularity scores 1-5)
- Created admin panel for tag management
- Integrated Nebius AI and Brave Search for 'Magic Scan'
- Refactored app focus: removed bottle status, updated counters, and displayed extended bottle details
- Updated i18n for German and English
- Added database migration scripts

src/app/admin/page.tsx

@@ -100,6 +100,12 @@ export default async function AdminPage() {
                         >
                             Manage Plans
                         </Link>
+                        <Link
+                            href="/admin/tags"
+                            className="px-4 py-2 bg-pink-600 hover:bg-pink-700 text-white rounded-xl font-bold transition-colors"
+                        >
+                            Manage Tags
+                        </Link>
                         <Link
                             href="/admin/users"
                             className="px-4 py-2 bg-amber-600 hover:bg-amber-700 text-white rounded-xl font-bold transition-colors"