Feat: Display error messages from intermediate nodes. #10427 (#12038)

### What problem does this PR solve?

Feat: Display error messages from intermediate nodes. #10427

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

web/src/pages/agent/index.tsx

@@ -182,6 +182,7 @@ export default function Agent() {
 
   const handleButtonRunClick = useCallback(() => {
     if (isWebhookMode) {
+      saveGraph();
       showWebhookTestSheet();
     } else if (isPipeline) {
       handleRunPipeline();
@@ -193,6 +194,7 @@ export default function Agent() {
     handleRunPipeline,
     isPipeline,
     isWebhookMode,
+    saveGraph,
     showWebhookTestSheet,
   ]);