fix(og): enable automatic OG image discovery and refine Traefik whitelist

- Removed manual 'images' metadata overrides.
- This allows Next.js to use built-in automatic discovery.
- Ensures metadata uses the dynamic metadataBase from the environment.
- Refined Traefik public router regex for sub-routes.
- Restored and verified imports in modified page.tsx files.

package.json

@@ -4,6 +4,7 @@
   "private": true,
   "dependencies": {
     "@directus/sdk": "^21.0.0",
+    "@medv/finder": "^4.0.2",
     "@mintel/mail": "1.7.12",
     "@mintel/next-config": "1.7.12",
     "@mintel/next-feedback": "1.7.12",