Feat: Allow users to enter text in the middle of a chat #3221 (#8569)

### What problem does this PR solve?

Feat: Allow users to enter text in the middle of a chat #3221
### Type of change


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

web/src/pages/agent/form/begin-form/use-watch-change.ts

@@ -17,8 +17,8 @@ export function useWatchFormChange(id?: string, form?: UseFormReturn) {
   const updateNodeForm = useGraphStore((state) => state.updateNodeForm);
 
   useEffect(() => {
-    if (id && form?.formState.isDirty) {
-      values = form?.getValues();
+    if (id) {
+      values = form?.getValues() || {};
 
       const nextValues = {
         ...values,