fix(newsletter): include hubspotutk (hutk) in HubSpot form submissions

src/hooks/useNewsletter.js

@@ -1,4 +1,5 @@
 import version from '../version/version'
+import getCookie from '../utils/getCookie'
 
 const PORTAL_ID = import.meta.env.VITE_HUBSPOT_PORTAL_ID
 const FORM_GUID = import.meta.env.VITE_HUBSPOT_FORM_GUID
@@ -7,6 +8,22 @@ const PAGE_NAME = import.meta.env.DEV
   ? `Mini-dashboard (dev)`
   : `Mini-dashboard v${version}`
 
+function getContext({ pageName }) {
+  const context = {
+    pageName,
+    pageUri: typeof window !== 'undefined' ? window.location.href : undefined,
+  }
+
+  // The `hubspotutk` cookie is set by HubSpot's tracking code and ties this
+  // submission to the visitor's tracked activity and the right contact record.
+  // Only include `hutk` when the cookie actually exists — HubSpot rejects an
+  // empty value with INVALID_HUTK, so a cookieless submission must omit it.
+  const hutk = getCookie('hubspotutk')
+  if (hutk) context.hutk = hutk
+
+  return context
+}
+
 function getBody({ email, pageName }) {
   return {
     fields: [
@@ -16,9 +33,7 @@ function getBody({ email, pageName }) {
         value: email,
       },
     ],
-    context: {
-      pageName,
-    },
+    context: getContext({ pageName }),
     legalConsentOptions: {
       consent: {
         consentToProcess: true,

src/utils/getCookie.js

@@ -0,0 +1,9 @@
+const getCookie = (name) => {
+  if (typeof document === 'undefined') return undefined
+  const value = `; ${document.cookie}`
+  const parts = value.split(`; ${name}=`)
+  if (parts.length === 2) return parts.pop().split(';').shift()
+  return undefined
+}
+
+export default getCookie