- Added extensive foreign‑component support and CSS‑var namespacing, including logical containers, host‑binding sanitization, and correct anchor ordering.
- Enhanced HttpClient with caching controls for credentialed/uncacheable requests, exact header matching, XSRF enabled by default, and deprecated the legacy JSONP API.
- Updated compiler and language service with new global‑foo error, standalone non‑exported class compilation, stricter default templates, migrations (injectable→service), SSR location validation, and RouterLinkActive null/undefined handling.