diff --git a/webui/src/web-components/demo/sketch-timeline-message.demo.html b/webui/src/web-components/demo/sketch-timeline-message.demo.html
index add83a1..6b9dbf5 100644
--- a/webui/src/web-components/demo/sketch-timeline-message.demo.html
+++ b/webui/src/web-components/demo/sketch-timeline-message.demo.html
@@ -19,7 +19,7 @@
           content: "a tool use message",
         },
         {
-          type:"agent",
+          type: "agent",
           content: `Mermaid Sequence Diagram Example
 \`\`\`mermaid
 sequenceDiagram