diff --git a/apps/ui/templates/dashboard.html b/apps/ui/templates/dashboard.html
index 5d123fb..6948355 100644
--- a/apps/ui/templates/dashboard.html
+++ b/apps/ui/templates/dashboard.html
@@ -726,6 +726,15 @@
             });
         });
         
+        // Clean up SSE connection before page unload
+        window.addEventListener('beforeunload', () => {
+            if (eventSource) {
+                console.log('Closing SSE connection before unload');
+                eventSource.close();
+                eventSource = null;
+            }
+        });
+        
         // API_BASE injected from backend (supports Docker/K8s environments)
         window.API_BASE = '{{ api_base }}';