Set `ssr: true` in Nuxt config and switch build command to `nuxt build`.
Update Dockerfile to run `.output/server/index.mjs` and remove static server.
Defer SEO initialization to prevent premature evaluation during SSR.
Replace global I18n singleton with a factory function
Inject request-specific I18n instances into Nuxt app and SEO metadata
Prevent cross-request locale state pollution during server-side rendering
Remove direct document.head mutations to support SSR compatibility
Implement observer pattern to sync SEO state with Nuxt universal plugin
Update analytics script to use declarative injection in Nuxt config
Add HTTP-only cookie session support to backend for SSR compatibility
Update frontend fetch calls to include credentials
Maintain legacy bearer token support for SPA transition
