feat: convert site to astro via codex

www/src/components/LanguageSwitcher.astro

@@ -0,0 +1,31 @@
+---
+import { getCollection } from 'astro:content';
+const pathname = Astro.url.pathname.replace(/\/$/, '') || '/';
+const bare = pathname.replace(/^\/(ar|es)(?=\/|$)/, '') || '/';
+const pages = await getCollection('pages', ({ data }) => !data.draft);
+const posts = await getCollection('blog', ({ data }) => !data.draft);
+const available = new Set<string>(['/', '/library', '/es', '/es/library', '/ar', '/ar/library']);
+for (const entry of pages) {
+  const prefix = entry.data.lang === 'en' ? '' : `/${entry.data.lang}`;
+  const route = entry.data.slug === 'index'
+    ? prefix || '/'
+    : entry.data.slug === 'library'
+      ? `${prefix}/library`
+      : `${prefix}/${entry.data.slug}`;
+  available.add(route);
+}
+for (const entry of posts) {
+  const prefix = entry.data.lang === 'en' ? '' : `/${entry.data.lang}`;
+  available.add(`${prefix}/library/${entry.data.slug}`);
+}
+const choices = [
+  { code: 'en', label: 'EN', href: bare },
+  { code: 'es', label: 'ES', href: `/es${bare === '/' ? '' : bare}` },
+  { code: 'ar', label: 'ع', href: `/ar${bare === '/' ? '' : bare}` }
+].filter(({ href }) => available.has(href));
+---
+<nav class="language-switcher" aria-label="Language">
+  {choices.map(({ code, label, href }) => (
+    <a href={href} lang={code} aria-current={pathname === href || (href === '/' && pathname === '/') ? 'page' : undefined}>{label}</a>
+  ))}
+</nav>