fix: URL lang when no storage pref (smartcontractkit#3165)

* fix: URL lang when no localStorage pref

* fix: URL lang when no localStorage pref

Author: khadni

src/components/HeadCommon.astro

@@ -62,6 +62,25 @@ const { title } = Astro.props
 <link rel="preconnect" href="https://www.googletagmanager.com" crossorigin />
 <link rel="preconnect" href="https://www.google-analytics.com" crossorigin />
 
+<!-- Set CRE SDK Language in dataLayer -->
+<script is:inline type="text/javascript">
+  ;(function () {
+    if (!window.location.pathname.startsWith("/cre")) return
+
+    try {
+      var savedLang = localStorage.getItem("docs-language-preference")
+      var language = savedLang === "ts" || savedLang === '"ts"' ? "ts" : "go"
+
+      window.dataLayer = window.dataLayer || []
+      window.dataLayer.push({
+        cre_sdk_language: language,
+      })
+    } catch (e) {
+      // localStorage unavailable, skip tracking
+    }
+  })()
+</script>
+
 <!-- Google Tag Manager (lazy init on first interaction or idle) -->
 <script type="text/javascript">
   ;(function (w, d, s, l, i) {
@@ -94,24 +113,6 @@ const { title } = Astro.props
   })(window, document, "script", "dataLayer", "GTM-N6DQ47T")
 </script>
 
-<script is:inline type="text/javascript">
-  ;(function () {
-    if (!window.location.pathname.startsWith("/cre")) return
-
-    try {
-      var savedLang = localStorage.getItem("docs-language-preference")
-      var language = savedLang === "ts" || savedLang === '"ts"' ? "ts" : "go"
-
-      window.dataLayer = window.dataLayer || []
-      window.dataLayer.push({
-        cre_sdk_language: language,
-      })
-    } catch (e) {
-      //skip tracking
-    }
-  })()
-</script>
-
 <meta name="algolia-site-verification" content="5C6E2FAC077D2F49" />
 
 <meta name="zd-site-verification" content="o5ebdvmw2aadxhrrro8id" />

src/pages/cre/[...id].astro

@@ -122,7 +122,7 @@ if (isCanonical) {
           is:inline
           slot="head-scripts"
           define:vars={{ goUrl: `/cre/${goEntry.id}`, tsUrl: `/cre/${tsEntry.id}`, currentLang: entry!.data.sdkLang }}
-          set:html={`(function(){try{var s=localStorage.getItem("docs-language-preference"),l=s==="ts"||s==='"ts"'?"ts":"go";if(l!==currentLang){var u=l==="ts"?tsUrl:goUrl;u&&window.location.replace(u)}}catch(e){}})();`}
+          set:html={`(function(){try{var s=localStorage.getItem("docs-language-preference");if(s){var l=s==="ts"||s==='"ts"'?"ts":"go";if(l!==currentLang){var u=l==="ts"?tsUrl:goUrl;u&&window.location.replace(u)}}else{try{localStorage.setItem("docs-language-preference",currentLang)}catch(e){}}}catch(e){}})();`}
         />
       )
     )