phase3-4 done

next-sitemap.config.js

@@ -1,15 +1,33 @@
 /** @type {import('next-sitemap').IConfig} */
 module.exports = {
-  siteUrl: "https://biztaghavi.com",
+  siteUrl: process.env.NEXT_PUBLIC_SITE_URL || "https://biztaghavi.com",
   generateRobotsTxt: true,
   generateIndexSitemap: false,
   changefreq: "weekly",
   priority: 0.7,
-  exclude: ["/studio/*", "/api/*"],
+  exclude: ["/studio/*", "/api/*", "/en/studio/*"],
+  alternateRefs: [
+    { href: "https://biztaghavi.com", hreflang: "fa" },
+    { href: "https://biztaghavi.com/en", hreflang: "en" },
+    { href: "https://biztaghavi.com", hreflang: "x-default" },
+  ],
   robotsTxtOptions: {
     policies: [
       { userAgent: "*", allow: "/" },
       { userAgent: "*", disallow: ["/studio", "/api"] },
     ],
+    additionalSitemaps: [],
+  },
+  transform: async (config, path) => {
+    // Boost priority for key pages
+    const highPriority = ["/", "/en", "/about", "/en/about", "/writing", "/en/writing"];
+    const priority = highPriority.includes(path) ? 1.0 : config.priority;
+    return {
+      loc: path,
+      changefreq: config.changefreq,
+      priority,
+      lastmod: config.autoLastmod ? new Date().toISOString() : undefined,
+      alternateRefs: config.alternateRefs ?? [],
+    };
   },
 };