Feat: Modify the style of the canvas operator node #3221 (#8261)

### What problem does this PR solve?

Feat: Modify the style of the canvas operator node #3221

### Type of change


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

web/src/pages/agent/canvas/node/node-wrapper.tsx

@@ -0,0 +1,18 @@
+import { cn } from '@/lib/utils';
+import { HTMLAttributes, PropsWithChildren } from 'react';
+
+export function NodeWrapper({
+  children,
+  className,
+}: PropsWithChildren & HTMLAttributes<HTMLDivElement>) {
+  return (
+    <section
+      className={cn(
+        'bg-background-header-bar p-2.5 rounded-md w-[200px]',
+        className,
+      )}
+    >
+      {children}
+    </section>
+  );
+}