feat: portal IA per spec (home entry point, /news, /proposals+redirect, /support), live search + suggestions, article TOC, mobile disclosure menu, CMS preview styles, modernization pass 1

src/pages/search.json.js

@@ -0,0 +1,19 @@
+// Build-time search index (Astro static endpoint — no server, no dependencies).
+// Kept lean: title/description/category/date/slug only (~60 KB for 200+ articles).
+import { getCollection } from 'astro:content';
+
+export async function GET() {
+  const posts = await getCollection('news', ({ data }) => !data.draft);
+  const index = posts
+    .sort((a, b) => b.data.date.valueOf() - a.data.date.valueOf())
+    .map((p) => ({
+      slug: p.id,
+      title: p.data.title,
+      description: p.data.description,
+      category: p.data.category,
+      date: p.data.date.toISOString().slice(0, 10),
+    }));
+  return new Response(JSON.stringify(index), {
+    headers: { 'Content-Type': 'application/json; charset=utf-8' },
+  });
+}