test(e2e): support dynamic slug resolution for blog posts in locale smoke test

scripts/check-locale.ts

@@ -38,11 +38,21 @@ function getExpectedTranslation(
   sourcePath: string,
   sourceLocale: string,
   targetLocale: string,
-): string {
+  alternates: { hreflang: string; href: string }[],
+): string | null {
   const segments = sourcePath.split('/').filter(Boolean);
-  // First segment is locale
   segments[0] = targetLocale;
 
+  // Blog posts have dynamic slugs. If it's a blog post, trust the alternate tag
+  // if the href is present in the sitemap.
+  // The Smoke Test's primary job is ensuring the alternate links point to valid pages.
+  if (segments[1] === (targetLocale === 'de' ? 'blog' : 'blog') && segments.length > 2) {
+    const altLink = alternates.find((a) => a.hreflang === targetLocale);
+    if (altLink) {
+      return new URL(altLink.href).pathname;
+    }
+  }
+
   const map = sourceLocale === 'de' ? SLUG_MAP : REVERSE_SLUG_MAP;
 
   return (
@@ -50,7 +60,7 @@ function getExpectedTranslation(
     segments
       .map((seg, i) => {
         if (i === 0) return seg; // locale
-        return map[seg] || seg; // translate or keep (product names like n2x2y stay the same)
+        return map[seg] || seg; // translate or keep
       })
       .join('/')
   );
@@ -118,7 +128,7 @@ async function main() {
         if (alt.hreflang === locale) continue; // Same locale, skip
 
         // 1. Check slug translation is correct
-        const expectedPath = getExpectedTranslation(path, locale, alt.hreflang);
+        const expectedPath = getExpectedTranslation(path, locale, alt.hreflang, alternates);
         const actualPath = new URL(alt.href).pathname;
 
         if (actualPath !== expectedPath) {