feat: astro built-ins — news pagination, prefetch, RSS, OG/SEO meta, TOC scrollspy (Starlight-pattern)

src/layouts/Base.astro

@@ -1,7 +1,13 @@
 ---
 import '../styles/global.css';
 // `ambient` opts a page into the whole-page drifting brand wash (home only — see DESIGN.md)
-const { title = 'CTAO Science Portal', description = 'CTAO Science Portal — demo', ambient = false } = Astro.props;
+// `type`/`image` feed the social meta: articles pass type="article" + their cover.
+const { title = 'CTAO Science Portal', description = 'CTAO Science Portal — demo', ambient = false, type = 'website', image } = Astro.props;
+// Absolute URLs for canonical/OG/RSS (head pattern from the official Astro blog
+// template). `site` is a placeholder domain until the portal has a real one.
+const site = Astro.site ?? new URL('https://portal.ctao.org');
+const canonical = new URL(Astro.url.pathname, site);
+const ogImage = new URL(image || '/brand/og-card.jpg', site);
 const path = Astro.url.pathname;
 const isActive = (href) => (href === '/' ? path === '/' : path.startsWith(href));
 // Navigation = services from the Science Portal spec (REQUIREMENTS.md §2/§5).
@@ -21,6 +27,17 @@ const links = [
     <meta name="viewport" content="width=device-width, initial-scale=1" />
     <title>{title}</title>
     <meta name="description" content={description} />
+    <link rel="canonical" href={canonical} />
+    {/* Social cards (Open Graph + Twitter) — article cover when present, brand card otherwise */}
+    <meta property="og:site_name" content="CTAO Science Portal" />
+    <meta property="og:title" content={title} />
+    <meta property="og:description" content={description} />
+    <meta property="og:type" content={type} />
+    <meta property="og:url" content={canonical} />
+    <meta property="og:image" content={ogImage} />
+    <meta name="twitter:card" content="summary_large_image" />
+    <link rel="alternate" type="application/rss+xml" title="CTAO Science Portal — News" href={new URL('/rss.xml', site)} />
+    <link rel="sitemap" href="/sitemap.xml" />
     <link rel="icon" href="/brand/CTAO_Logo_positive.svg" type="image/svg+xml" />
     {/* Brand typography (BRAND D.3): Inter (body) + Space Grotesk (headlines),
         self-hosted latin woff2 (variable) — @font-face lives in global.css. */}

src/pages/index.astro

@@ -38,7 +38,7 @@ const services = [
 
   <script is:inline src="/search-client.js"></script>
   <script is:inline>
-    newsSearch({ input: 'home-q', list: 'home-suggest', status: 'home-suggest-status', limit: 6, unit: 'suggestion(s)' });
+    newsSearch({ input: 'home-q', list: 'home-suggest', status: 'home-suggest-status', limit: 6, unit: 'suggestion' });
   </script>
 
   {/* Surface rhythm (DESIGN.md): services on Moon Gray, editorial news on white */}

src/pages/news/[...page].astro

@@ -0,0 +1,76 @@
+---
+import { getCollection } from 'astro:content';
+import Base from '../../layouts/Base.astro';
+
+// Paginated archive via Astro's built-in paginate(): the [...page] rest route
+// makes page 1 the bare /news URL, then /news/2 … /news/N.
+export async function getStaticPaths({ paginate }) {
+  const posts = (await getCollection('news', ({ data }) => !data.draft)).sort(
+    (a, b) => b.data.date.valueOf() - a.data.date.valueOf(),
+  );
+  return paginate(posts, { pageSize: 24 });
+}
+
+const { page } = Astro.props;
+const first = page.currentPage === 1;
+const fmt = (d) => new Intl.DateTimeFormat('en-GB', { dateStyle: 'long' }).format(d);
+const iso = (d) => d.toISOString().slice(0, 10);
+// Windowed page list — 1 … n-1 n n+1 … last (0 marks an ellipsis)
+const nums = [];
+for (let n = 1; n <= page.lastPage; n++) {
+  if (n === 1 || n === page.lastPage || Math.abs(n - page.currentPage) <= 1) nums.push(n);
+  else if (nums.at(-1) !== 0) nums.push(0);
+}
+const hrefFor = (n) => (n === 1 ? '/news' : `/news/${n}`);
+---
+<Base
+  title={first ? 'CTAO Science Portal — News' : `CTAO Science Portal — News, page ${page.currentPage}`}
+  description={first ? 'News and announcements of the CTAO' : `News and announcements of the CTAO — page ${page.currentPage} of ${page.lastPage}`}
+>
+  <section class="hero-band">
+    <div class="band-bg" aria-hidden="true"></div>
+    <div class="container hero">
+      <div class="eyebrow">Cherenkov Telescope Array Observatory</div>
+      <h1>News &amp; Announcements</h1>
+      <p>Exploring the Universe at the Highest Energies</p>
+    </div>
+  </section>
+
+  <section class="container page">
+    <h2 class="sr-only">{first ? 'All news' : `All news — page ${page.currentPage}`}</h2>
+    <div class="grid">
+      {page.data.map((post, i) => (
+        <article class={first && i === 0 ? 'card card--featured' : 'card'}>
+          {post.data.cover && (
+            <img class="cover" src={encodeURI(post.data.cover)} alt="" loading={first && i === 0 ? 'eager' : 'lazy'} />
+          )}
+          <div class="body">
+            <span class="cat">{post.data.category}</span>
+            <h3><a href={`/news/${post.id}`}>{post.data.title}</a></h3>
+            <p class="desc">{post.data.description}</p>
+            <div class="meta">{post.data.author} · <time datetime={iso(post.data.date)}>{fmt(post.data.date)}</time></div>
+          </div>
+        </article>
+      ))}
+    </div>
+    {page.lastPage > 1 && (
+      <nav class="pagination" aria-label="News pages">
+        {page.url.prev
+          ? <a class="page-link page-step" href={page.url.prev} rel="prev">← Newer</a>
+          : <span class="page-link page-step" aria-hidden="true">← Newer</span>}
+        <ol>
+          {nums.map((n) => (
+            <li>
+              {n === 0
+                ? <span class="page-gap" aria-hidden="true">…</span>
+                : <a class="page-link" href={hrefFor(n)} aria-current={n === page.currentPage ? 'page' : undefined}><span class="sr-only">Page </span>{n}</a>}
+            </li>
+          ))}
+        </ol>
+        {page.url.next
+          ? <a class="page-link page-step" href={page.url.next} rel="next">Older →</a>
+          : <span class="page-link page-step" aria-hidden="true">Older →</span>}
+      </nav>
+    )}
+  </section>
+</Base>

src/pages/news/[slug].astro

@@ -12,7 +12,7 @@ const { Content, headings } = await render(post);
 const toc = headings.filter((h) => h.depth === 2 || h.depth === 3);
 const fmt = (d) => new Intl.DateTimeFormat('en-GB', { dateStyle: 'long' }).format(d);
 ---
-<Base title={`${post.data.title} — CTAO`} description={post.data.description}>
+<Base title={`${post.data.title} — CTAO`} description={post.data.description} type="article" image={post.data.cover && encodeURI(post.data.cover)}>
   {/* TOC pattern (MDN/Stripe/NN-g): sticky right rail ≥1200px, collapsed <details>
       under the title below that. CSS shows exactly one of the two (DESIGN.md). */}
   <div class="container article-layout">
@@ -47,3 +47,54 @@ const fmt = (d) => new Intl.DateTimeFormat('en-GB', { dateStyle: 'long' }).forma
     )}
   </div>
 </Base>
+
+<script>
+  // TOC scrollspy — minimal vanilla take on Starlight's starlight-toc.ts:
+  // an IntersectionObserver band near the viewport top; whichever prose block
+  // enters it is mapped back to its governing h2/h3, whose TOC link(s) get
+  // aria-current="true" (set in BOTH renderings — inline <details> and rail).
+  // Progressive enhancement: without JS the TOC is plain working anchors.
+  const links = [...document.querySelectorAll('.toc a[href^="#"]')];
+  if (links.length) {
+    let current = [];
+    const setCurrent = (id) => {
+      const next = id ? links.filter((a) => decodeURIComponent(a.hash.slice(1)) === id) : [];
+      if (next[0] === current[0]) return;
+      for (const a of current) a.removeAttribute('aria-current');
+      for (const a of next) a.setAttribute('aria-current', 'true');
+      current = next;
+    };
+    const blocks = [...document.querySelectorAll('.prose > *')];
+    // Governing heading = the block itself or the nearest h2/h3[id] above it
+    const headingFor = (el) => {
+      for (let i = blocks.indexOf(el); i >= 0; i--) {
+        if (blocks[i].matches('h2[id], h3[id]')) return blocks[i].id;
+      }
+      return null; // intro before the first heading — nothing highlighted
+    };
+    const onIntersect = (entries) => {
+      for (const e of entries) {
+        if (e.isIntersecting) { setCurrent(headingFor(e.target)); break; }
+      }
+    };
+    let observer;
+    const observe = () => {
+      observer?.disconnect();
+      // Narrow band below the sticky header (64px) — Starlight's rootMargin trick
+      const top = 76, band = 64;
+      observer = new IntersectionObserver(onIntersect, {
+        rootMargin: `-${top}px 0px ${top + band - document.documentElement.clientHeight}px`,
+      });
+      blocks.forEach((b) => observer.observe(b));
+    };
+    observe();
+    let timer;
+    addEventListener('resize', () => { clearTimeout(timer); timer = setTimeout(observe, 200); });
+    // Short final section: at page bottom, the last heading wins
+    addEventListener('scroll', () => {
+      if (innerHeight + scrollY >= document.documentElement.scrollHeight - 4) {
+        setCurrent(headingFor(blocks.at(-1)));
+      }
+    }, { passive: true });
+  }
+</script>

src/pages/news/index.astro

@@ -1,39 +0,0 @@
----
-import { getCollection } from 'astro:content';
-import Base from '../../layouts/Base.astro';
-
-const posts = (await getCollection('news', ({ data }) => !data.draft)).sort(
-  (a, b) => b.data.date.valueOf() - a.data.date.valueOf(),
-);
-const fmt = (d) => new Intl.DateTimeFormat('en-GB', { dateStyle: 'long' }).format(d);
-const iso = (d) => d.toISOString().slice(0, 10);
----
-<Base title="CTAO Science Portal — News" description="News and announcements of the CTAO">
-  <section class="hero-band">
-    <div class="band-bg" aria-hidden="true"></div>
-    <div class="container hero">
-      <div class="eyebrow">Cherenkov Telescope Array Observatory</div>
-      <h1>News &amp; Announcements</h1>
-      <p>Exploring the Universe at the Highest Energies</p>
-    </div>
-  </section>
-
-  <section class="container page">
-    <h2 class="sr-only">All news</h2>
-    <div class="grid">
-      {posts.map((post, i) => (
-        <article class={i === 0 ? 'card card--featured' : 'card'}>
-          {post.data.cover && (
-            <img class="cover" src={encodeURI(post.data.cover)} alt="" loading={i === 0 ? 'eager' : 'lazy'} />
-          )}
-          <div class="body">
-            <span class="cat">{post.data.category}</span>
-            <h3><a href={`/news/${post.id}`}>{post.data.title}</a></h3>
-            <p class="desc">{post.data.description}</p>
-            <div class="meta">{post.data.author} · <time datetime={iso(post.data.date)}>{fmt(post.data.date)}</time></div>
-          </div>
-        </article>
-      ))}
-    </div>
-  </section>
-</Base>

src/pages/rss.xml.js

@@ -0,0 +1,43 @@
+// RSS 2.0 feed — hand-rolled static endpoint like search.json.js (no @astrojs/rss
+// dependency; the spec is 20 lines of XML). Newest 30 items, absolute URLs from
+// the configured `site`.
+import { getCollection } from 'astro:content';
+
+const esc = (s = '') =>
+  s.replace(/[<>&'"]/g, (c) => ({ '<': '&lt;', '>': '&gt;', '&': '&amp;', "'": '&apos;', '"': '&quot;' })[c]);
+
+export async function GET(context) {
+  const site = context.site ?? new URL('https://portal.ctao.org');
+  const posts = (await getCollection('news', ({ data }) => !data.draft))
+    .sort((a, b) => b.data.date.valueOf() - a.data.date.valueOf())
+    .slice(0, 30);
+
+  const items = posts
+    .map((p) => {
+      const url = new URL(`/news/${p.id}`, site).href;
+      return `    <item>
+      <title>${esc(p.data.title)}</title>
+      <link>${url}</link>
+      <guid isPermaLink="true">${url}</guid>
+      <pubDate>${p.data.date.toUTCString()}</pubDate>
+      <description>${esc(p.data.description)}</description>
+      <category>${esc(p.data.category)}</category>
+    </item>`;
+    })
+    .join('\n');
+
+  const xml = `<?xml version="1.0" encoding="UTF-8"?>
+<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
+  <channel>
+    <title>CTAO Science Portal — News</title>
+    <link>${new URL('/news', site).href}</link>
+    <description>News and announcements of the Cherenkov Telescope Array Observatory</description>
+    <language>en</language>
+    <lastBuildDate>${(posts[0]?.data.date ?? new Date()).toUTCString()}</lastBuildDate>
+    <atom:link href="${new URL('/rss.xml', site).href}" rel="self" type="application/rss+xml"/>
+${items}
+  </channel>
+</rss>
+`;
+  return new Response(xml, { headers: { 'Content-Type': 'application/rss+xml; charset=utf-8' } });
+}

src/pages/sitemap.xml.js

@@ -0,0 +1,28 @@
+// Sitemap — hand-rolled static endpoint (no @astrojs/sitemap dependency; our URL
+// set is fully known at build time). /admin is intentionally excluded.
+import { getCollection } from 'astro:content';
+
+const PAGE_SIZE = 24; // keep in sync with src/pages/news/[...page].astro
+
+export async function GET(context) {
+  const site = context.site ?? new URL('https://portal.ctao.org');
+  const news = (await getCollection('news', ({ data }) => !data.draft))
+    .sort((a, b) => b.data.date.valueOf() - a.data.date.valueOf());
+  const pages = await getCollection('pages');
+
+  const urls = [
+    '/', '/news', '/proposals', '/dashboard', '/support', '/search', '/login',
+    ...Array.from({ length: Math.ceil(news.length / PAGE_SIZE) - 1 }, (_, i) => `/news/${i + 2}`),
+    ...pages.map((p) => `/pages/${p.id}`),
+  ].map((path) => `  <url><loc>${new URL(path, site).href}</loc></url>`);
+  const articles = news.map(
+    (p) => `  <url><loc>${new URL(`/news/${p.id}`, site).href}</loc><lastmod>${p.data.date.toISOString().slice(0, 10)}</lastmod></url>`,
+  );
+
+  const xml = `<?xml version="1.0" encoding="UTF-8"?>
+<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
+${[...urls, ...articles].join('\n')}
+</urlset>
+`;
+  return new Response(xml, { headers: { 'Content-Type': 'application/xml; charset=utf-8' } });
+}

src/styles/global.css

@@ -236,7 +236,7 @@ img { max-width: 100%; height: auto; display: block; }
 }
 .suggest:empty { display: none; }
 .suggest li { display: flex; align-items: center; gap: var(--space-s); padding: 0 12px; border-radius: calc(var(--radius) - 8px); }
-.suggest li:hover { background: var(--moon); }
+.suggest li:hover, .suggest li:focus-within { background: var(--moon); }
 .suggest a {
   flex: 1; display: flex; align-items: center; min-height: 44px;
   color: var(--text); font-weight: 500; font-size: 0.94rem; text-decoration: none;
@@ -310,6 +310,25 @@ img { max-width: 100%; height: auto; display: block; }
   .card--featured .desc { -webkit-line-clamp: 3; line-clamp: 3; }
 }
 
+/* Pagination (news archive) — prev/next + windowed page numbers; ≥44px targets.
+   Pattern mined from AstroPaper/Astro blog templates, numbers added for 9 pages. */
+.pagination {
+  display: flex; align-items: center; justify-content: center; flex-wrap: wrap;
+  gap: 4px var(--space-s); margin-top: var(--space-xl);
+}
+.pagination ol { display: flex; flex-wrap: wrap; justify-content: center; list-style: none; margin: 0; padding: 0; gap: 4px; }
+.page-link {
+  display: inline-flex; align-items: center; justify-content: center;
+  min-width: 44px; min-height: 44px; padding: 0 12px;
+  border-radius: var(--radius-pill); text-decoration: none; font-weight: 500; color: var(--text);
+}
+a.page-link:hover { background: var(--moon); color: var(--indigo); }
+.page-link[aria-current="page"] { background: var(--galaxy); color: #fff; }
+.page-step { font-weight: 600; }
+a.page-step { color: var(--link); }
+span.page-step { color: var(--muted); } /* disabled end stop — non-interactive */
+.page-gap { display: inline-flex; align-items: center; justify-content: center; min-width: 24px; min-height: 44px; color: var(--muted); }
+
 /* Service tiles — card tokens, text-first */
 .tile { padding: var(--space-m); gap: 8px; }
 .tile h3 { margin: 0; }
@@ -347,6 +366,8 @@ img { max-width: 100%; height: auto; display: block; }
 .toc .d3 { padding-left: var(--space-s); }
 .toc a { text-decoration: none; display: inline-flex; align-items: center; min-height: 24px; }
 .toc a:hover { text-decoration: underline; }
+/* Scrollspy state (set by the [slug].astro script) — functional, not motion */
+.toc a[aria-current="true"] { color: var(--galaxy); font-weight: 600; }
 .toc--inline { margin-bottom: var(--space-l); }
 .toc--rail { display: none; }
 @media (min-width: 1200px) {
@@ -413,6 +434,9 @@ img { max-width: 100%; height: auto; display: block; }
   color: var(--muted); white-space: nowrap; font-size: 0.78rem;
   background: var(--moon); border-radius: var(--radius-pill); padding: 2px 10px;
 }
+/* Matched-term highlight in results/suggestions (Starlight search pattern) —
+   brand tint only, no new hues */
+mark { background: var(--tint-cherenkov); color: inherit; border-radius: calc(var(--radius) - 12px); padding: 0 2px; }
 
 /* Mock/status badges — every mock must be labelled (REQUIREMENTS.md §5) */
 .badge-mock, .badge-ext {
@@ -513,6 +537,9 @@ img { max-width: 100%; height: auto; display: block; }
   /* Hover feedback */
   .card, .search-results li { transition: border-color 0.15s ease, box-shadow 0.2s ease, transform 0.2s ease; }
   .card:hover { transform: translateY(-2px); }
+  /* Editorial cover micro-zoom on card hover (AstroWind pattern; card clips it) */
+  .card .cover { transition: transform 0.3s ease; }
+  .card:hover .cover, .card:focus-within .cover { transform: scale(1.03); }
   .btn, .login-mock, .navlink { transition: background-color 0.15s ease, color 0.15s ease; }
 }
 @keyframes nebula { /* inert unless applied inside the block above */