handoff review fixes: deploy log removed from the repo (internal infra notes do not belong in the handover), diagrams moved to the content repo, pages glob non-recursive, dead badge/pill css and stale design-system pointers removed, node engines declared, README states access and node prerequisites, demo-only dev server settings dropped, audit clean

astro.config.mjs

@@ -19,7 +19,6 @@ export default defineConfig({
   // cost of 'viewport' on a 24-card grid; auto-falls back to 'tap' on
   // data-saver / slow connections (Astro handles that).
   prefetch: { prefetchAll: true },
-  server: { port: 4321, host: true },
   vite: {
     build: {
       // Lightning CSS (the default minifier) illegally folds animation-timeline
@@ -28,10 +27,5 @@ export default defineConfig({
       // esbuild minifies without property merging.
       cssMinify: 'esbuild',
     },
-    server: {
-      // Vite blocks unknown Host headers by default; the demo is viewed through an
-      // ephemeral cloudflared quick tunnel, so allow any *.trycloudflare.com host.
-      allowedHosts: ['.trycloudflare.com'],
-    },
   },
 });