feat: implement marketing pages, core QR tools, and SEO infrastructure for QR Master

src/app/sitemap.ts

@@ -46,11 +46,15 @@ export default function sitemap(): MetadataRoute.Sitemap {
       priority: 0.8,
     }));
 
+  const highPriorityTools: Record<string, number> = {
+    'barcode-generator': 0.95,
+  };
+
   const toolPages = freeTools.map((slug) => ({
     url: `${baseUrl}/tools/${slug}`,
     lastModified: new Date(),
     changeFrequency: 'monthly' as const,
-    priority: 0.8,
+    priority: highPriorityTools[slug] ?? 0.8,
   }));
 
   // Learn hub and pillar pages