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/components/xyflow/base-node.tsx

@@ -9,7 +9,7 @@ export const BaseNode = forwardRef<
   <div
     ref={ref}
     className={cn(
-      'relative rounded-md border bg-card text-card-foreground',
+      'relative rounded-md bg-card text-card-foreground',
       className,
       selected ? 'border-muted-foreground shadow-lg' : '',
       'hover:ring-1',