@

feat(web): SEO — server-rendered template pages + /guides articles

- templates/[slug] converted from client to server component: per-template
  generateMetadata (title/description/canonical/OG) + SoftwareApplication
  JSON-LD; code-audit toggle split into a client island; missing/non-public
  templates now return a real 404.
- sitemap.ts pulls public template slugs live from the API (best-effort) +
  the new /guides routes.
- new /guides section: 3 server-rendered SEO articles (host MCP with OAuth,
  hosted-platforms comparison, MintMCP alternative) with TechArticle JSON-LD;
  Guides link added to the marketing nav.
- lib/seo.ts: articleJsonLd + templateJsonLd builders.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
@

apps/web/lib/seo.ts

@@ -184,6 +184,58 @@ export function faqJsonLd(items: FaqItem[] = FAQ): object {
   };
 }
 
+/** TechArticle structured data for /guides/* SEO articles. */
+export function articleJsonLd(opts: {
+  title: string;
+  description: string;
+  path: string;
+  datePublished: string;
+  dateModified?: string;
+}): object {
+  return {
+    '@context': 'https://schema.org',
+    '@type': 'TechArticle',
+    headline: opts.title,
+    description: opts.description,
+    url: `${SITE_URL}${opts.path}`,
+    mainEntityOfPage: { '@type': 'WebPage', '@id': `${SITE_URL}${opts.path}` },
+    datePublished: opts.datePublished,
+    dateModified: opts.dateModified ?? opts.datePublished,
+    inLanguage: 'en',
+    author: { '@id': `${SITE_URL}/#organization` },
+    publisher: { '@id': `${SITE_URL}/#organization` },
+  };
+}
+
+/** SoftwareApplication structured data for a published marketplace template. */
+export function templateJsonLd(opts: {
+  slug: string;
+  title: string;
+  description: string;
+  category: string;
+  tools: string[];
+  author: string | null;
+}): object {
+  return {
+    '@context': 'https://schema.org',
+    '@type': 'SoftwareApplication',
+    '@id': `${SITE_URL}/templates/${opts.slug}#software`,
+    name: opts.title,
+    description: opts.description,
+    url: `${SITE_URL}/templates/${opts.slug}`,
+    applicationCategory: 'DeveloperApplication',
+    applicationSubCategory: 'MCP server',
+    operatingSystem: 'Web Browser',
+    inLanguage: 'en',
+    keywords: ['MCP server', 'Model Context Protocol', opts.category],
+    featureList: opts.tools,
+    isAccessibleForFree: true,
+    offers: { '@type': 'Offer', price: '0', priceCurrency: 'EUR' },
+    ...(opts.author ? { author: { '@type': 'Person', name: opts.author } } : {}),
+    publisher: { '@id': `${SITE_URL}/#organization` },
+  };
+}
+
 /**
  * Per-page metadata. `title` is a bare string so the root layout's
  * "%s | BuildMyMCPServer" template appends the brand exactly once.