refactor: single account-level SSE stream instead of per-monitor connections

apps/web/src/dashboard/app.js

@@ -58,14 +58,15 @@ function escapeHtml(str) {
   return div.innerHTML;
 }
 
-// Subscribe to live ping updates for a monitor via SSE (fetch-based for auth header support)
-// Returns an AbortController — call .abort() to close
-function watchMonitor(monitorId, onPing) {
+// Subscribe to live ping updates for the whole account via a single SSE stream.
+// onPing receives each ping object (includes monitor_id).
+// Returns an AbortController — call .abort() to close.
+function watchAccount(onPing) {
   const ac = new AbortController();
 
   async function connect() {
     try {
-      const res = await fetch(`/monitors/${monitorId}/stream`, {
+      const res = await fetch(`/account/stream`, {
         credentials: 'same-origin',
         signal: ac.signal,
       });
@@ -87,7 +88,6 @@ function watchMonitor(monitorId, onPing) {
       }
     } catch (e) {
       if (e.name === 'AbortError') return;
-      // Reconnect after a short delay on unexpected disconnect
       setTimeout(connect, 3000);
     }
   }