SEO: multilingual homepage (homeSlug per locale in path/sitemap), Article + llms.txt generators, siteDescription fallback, composeTitle dedup

dist/modules/seo/buildMetadata.js

@@ -9,7 +9,7 @@ import { buildHreflangAlternates } from './hreflang.js';
  * Designed for use inside Next.js `generateMetadata`. The caller resolves the
  * pieces (meta group, site name, image URL, localized slugs) and passes them
  * in — the plugin composes, it doesn't fetch.
- */ export function buildMetadata({ baseUrl, config, homeSlug = 'home', imageUrl, locale, meta, order, pageTitle, prefix, query, separator, siteName, slugs }) {
+ */ export function buildMetadata({ baseUrl, config, homeSlug = 'home', imageUrl, locale, meta, order, pageTitle, prefix, query, separator, siteDescription, siteName, slugs }) {
     // Title source priority: titleOverride (exact, wins outright) > meta.title
     // (SEO title an editor set) > pageTitle (the document's own name). This means
     // a page with no SEO title still shows its name (e.g. 'Sprzątanie biur')
@@ -22,7 +22,7 @@ import { buildHreflangAlternates } from './hreflang.js';
         separator,
         siteName
     });
-    const description = meta?.description?.trim() || undefined;
+    const description = meta?.description?.trim() || siteDescription?.trim() || undefined;
     const origin = baseUrl?.replace(/\/$/, '') ?? '';
     const suffix = query ?? '';
     const currentPath = buildLocalizedPath({