Fix: Use RESEND_TOKEN environment variable name

functions/api/unsubscribe.js

@@ -3,11 +3,25 @@ export async function onRequestPost({ request, env }) {
   if (!email || !/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(email))
     return new Response('{"error":"Invalid email"}', { status: 400, headers: { 'Content-Type': 'application/json' } });
 
+  const res = await fetch('https://api.resend.com/contacts', {
+    method: 'POST',
+    headers: {
+      'Content-Type': 'application/json',
+      'Authorization': `Bearer ${env.RESEND_TOKEN}`
+    },
+    body: JSON.stringify({ email, unsubscribed: true })
+  });
+
+  if (!res.ok) {
+    const text = await res.text();
+    return new Response(`{"error":"Resend error: ${text}"}`, { status: 500, headers: { 'Content-Type': 'application/json' } });
+  }
+
   await fetch(`https://ntfy.sh/${env.NTFY_TOPIC}`, {
     method: 'POST',
     headers: { Priority: '3', Title: `🔕 Unsubscribe` },
     body: email
   });
-  
+
   return new Response('{"ok":true}', { headers: { 'Content-Type': 'application/json' } });
 }