Prerender or server-render unit pages so content ships in HTML

[jenul-ferdinand]

What

• Add SSR or build-time prerendering for the frontend, starting with unit pages.

Why

• The app is client-side rendered only, with no @angular/ssr setup. Content appears only after the browser runs the JS bundle.
• Google renders JS, but on a delay and not on every crawl. Bing, social scrapers, and LLM crawlers often skip JS, so they see an empty shell.
• Unit pages hold the main SEO content and are fairly static, which makes them a good prerender target.

Notes

• Angular 18 supports SSR and static prerendering through @angular/ssr.
• Prerendering the unit routes at build is the lower-risk option. Full SSR fits if pages need per-request data.
• This is the largest SEO change. Scope it on its own.