Feat: Downstream operators can get the variables defined by the user input operator #3221 (#9036)

### What problem does this PR solve?

Feat: Downstream operators can get the variables defined by the user
input operator #3221

### Type of change


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

web/src/pages/agent/canvas/node/index.tsx

@@ -2,6 +2,7 @@ import { IRagNode } from '@/interfaces/database/flow';
 import { NodeProps, Position } from '@xyflow/react';
 import { memo } from 'react';
 import { NodeHandleId } from '../../constant';
+import { needsSingleStepDebugging } from '../../utils';
 import { CommonHandle } from './handle';
 import { LeftHandleStyle, RightHandleStyle } from './handle-icon';
 import NodeHeader from './node-header';
@@ -15,7 +16,12 @@ function InnerRagNode({
   selected,
 }: NodeProps<IRagNode>) {
   return (
-    <ToolBar selected={selected} id={id} label={data.label}>
+    <ToolBar
+      selected={selected}
+      id={id}
+      label={data.label}
+      showRun={needsSingleStepDebugging(data.label)}
+    >
       <NodeWrapper selected={selected}>
         <CommonHandle
           id={NodeHandleId.End}