integration: add route metadata, JSON-LD and harden the public shell

Ship prerendered SEO, crawl files and palette/map a11y so every locale route is indexable, honest and keyboard-usable without inventing claims.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/app/shared/systems-map/systems-map.scss

@@ -181,8 +181,4 @@
   .systems-map-figure {
     display: block;
   }
-
-  .systems-map-list {
-    display: none;
-  }
 }