fix: point dashboard API calls to api.pingql.com

apps/web/src/dashboard/app.js

@@ -1,7 +1,7 @@
 // PingQL Dashboard — shared utilities
 // Auth is now cookie-based. No localStorage needed.
 
-const API_BASE = window.location.origin;
+const API_BASE = 'https://api.pingql.com';
 
 function logout() {
   window.location.href = '/dashboard/logout';
@@ -66,7 +66,7 @@ function watchAccount(onPing) {
 
   async function connect() {
     try {
-      const res = await fetch(`/account/stream`, {
+      const res = await fetch(`${API_BASE}/account/stream`, {
         credentials: 'same-origin',
         signal: ac.signal,
       });