diff --git a/tools/server/public/index.html.gz b/tools/server/public/index.html.gz
index e15370122a..0e460373fd 100644
Binary files a/tools/server/public/index.html.gz and b/tools/server/public/index.html.gz differ
diff --git a/tools/server/webui/src/lib/components/app/notebook/NotebookScreen.svelte b/tools/server/webui/src/lib/components/app/notebook/NotebookScreen.svelte
index 24075a068c..40027c1f31 100644
--- a/tools/server/webui/src/lib/components/app/notebook/NotebookScreen.svelte
+++ b/tools/server/webui/src/lib/components/app/notebook/NotebookScreen.svelte
@@ -177,8 +177,17 @@
 			scrollInterval = undefined;
 		}
 	});
+
+	function handleBeforeUnload(event: BeforeUnloadEvent) {
+		if (inputContent.length > 0) {
+			event.preventDefault();
+			event.returnValue = '';
+		}
+	}
 </script>
 
+<svelte:window onbeforeunload={handleBeforeUnload} />
+
 <div class="flex h-full flex-col">
 	<header
 		class="flex items-center justify-between border-b border-border/40 bg-background/95 px-6 py-3 backdrop-blur supports-[backdrop-filter]:bg-background/60"