fix: fetch sparkline/chart immediately on SSE ping, no debounce delay

apps/web/src/views/detail.ejs

@@ -265,18 +265,16 @@
       }
     });
 
-    // SSE: account stream filtered to this monitor — refresh chart on ping
-    let _chartRefreshTimer = null;
-    watchAccount((ping) => {
-      if (ping.monitor_id !== monitorId) return;
-      if (_chartRefreshTimer) return;
-      _chartRefreshTimer = setTimeout(async () => {
-        _chartRefreshTimer = null;
-        try {
-          const res = await fetch(`/dashboard/monitors/${monitorId}/chart`, { credentials: 'same-origin' });
-          if (res.ok) document.getElementById('latency-chart').innerHTML = await res.text();
-        } catch {}
-      }, 5000);
+    // SSE: on ping for this monitor, fetch fresh chart
+    let _fetchingChart = false;
+    watchAccount(async (ping) => {
+      if (ping.monitor_id !== monitorId || _fetchingChart) return;
+      _fetchingChart = true;
+      try {
+        const res = await fetch(`/dashboard/monitors/${monitorId}/chart`, { credentials: 'same-origin' });
+        if (res.ok) document.getElementById('latency-chart').innerHTML = await res.text();
+      } catch {}
+      _fetchingChart = false;
     });
   </script>