astro check restored: tsconfig excludes public/ (the 2 MB vendored CMS bundle was what exhausted the heap) and extends tsconfigs/strict; type annotations in template scripts, z from astro/zod; exact version pins; compressHTML true (lossless whitespace, no words glued to links) and explicit trailingSlash/build.format; README: upgrading section

astro.config.mjs

@@ -6,6 +6,14 @@ export default defineConfig({
   // Public origin — used to build absolute URLs (canonical, og:*, RSS,
   // sitemap). Change when the portal moves to its production domain.
   site: 'https://astro.isl-dev.grid.cyfronet.pl',
+  // URL contract, pinned explicitly (these are the defaults): changing either
+  // later rewrites every public URL. nginx serves /path/ via try_files $uri/.
+  trailingSlash: 'ignore',
+  build: { format: 'directory' },
+  // Lossless whitespace handling instead of the v7 default 'jsx', which drops
+  // line breaks around inline elements and silently glues words to links when
+  // a template line wraps before <a>. Templates render as written.
+  compressHTML: true,
   // Built-in prefetch on every internal link (no per-link attributes needed).
   // Default 'hover' strategy: near-instant navigation without the bandwidth
   // cost of 'viewport' on a 24-card grid; auto-falls back to 'tap' on