fix sitemap

v3/src/utils/sitemap.mjs

@@ -0,0 +1,18 @@
+const NON_INDEXABLE_SECTIONS = new Set(['404', 'cancel', 'success', 'tag']);
+
+/**
+ * Keep sitemap entries aligned with the routes that are allowed to be indexed.
+ * Astro passes absolute page URLs to the sitemap filter.
+ */
+export const shouldIncludeInSitemap = (pageUrl, locales = []) => {
+  const segments = new URL(pageUrl).pathname.split('/').filter(Boolean);
+
+  if (locales.includes(segments[0])) {
+    segments.shift();
+  }
+
+  const blogPage = Number(segments[1]);
+  const isNoindexBlogPagination = segments[0] === 'blog' && /^\d+$/.test(segments[1] ?? '') && blogPage > 1;
+
+  return !NON_INDEXABLE_SECTIONS.has(segments[0]) && !isNoindexBlogPagination;
+};