feat: complete memorial website features

- Add user contribution system (memories, timeline entries)
- Add AI content moderation with Ollama (bad word detection + qwen3:4b)
- Add family photo/video upload with admin approval
- Add candle lighting feature
- Add timeline and recipe sections
- Add QR code page and OG image
- Add site authentication (password-protected access)
- Add proxy middleware for auth routing
- Add admin dashboard for content management
- Remove email fields, make name optional (default: Anonym)
- Add CI/CD pipeline for Gitea Actions
- Add Docker deployment configuration
- Optimize Ollama RAM usage (42GB → 2.9GB)
- Fix API routes accessibility through proxy middleware

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

src/app/layout.tsx

@@ -22,6 +22,7 @@ const lora = Lora({
 export const dynamic = 'force-dynamic'
 
 export const metadata: Metadata = {
+  metadataBase: new URL(process.env.NEXT_PUBLIC_URL || 'http://localhost:3000'),
   title: 'In Erinnerung an Maria Malejka',
   description:
     'Eine liebevolle Gedenkseite für Maria Malejka · 29. November 1944 – 10. Februar 2026',
@@ -29,6 +30,20 @@ export const metadata: Metadata = {
     title: 'In Erinnerung an Maria Malejka',
     description: '29. November 1944 – 10. Februar 2026',
     type: 'website',
+    images: [
+      {
+        url: '/og-image.jpg',
+        width: 1200,
+        height: 630,
+        alt: 'In Erinnerung an Maria Malejka',
+      },
+    ],
+  },
+  twitter: {
+    card: 'summary_large_image',
+    title: 'In Erinnerung an Maria Malejka',
+    description: '29. November 1944 – 10. Februar 2026',
+    images: ['/og-image.jpg'],
   },
 }