fix: styles of border and copy

frontend/src/components/nodes/RenderingNode.tsx

@@ -32,6 +32,7 @@ import { Input } from '../ui/input'
 import { Button } from '../ui/button'
 import { ToggleGroup, ToggleGroupItem } from '../ui/toggle-group'
 import { useTheme } from '../../lib/themeContext'
+import { toast } from 'sonner'
 
 export type RenderingNodeData = {
     viewportWidth?: number
@@ -759,7 +760,9 @@ function RenderingNodeComponent({ id, data, width, height, selected }: Props) {
                                     className="absolute top-2 right-2 z-10 h-7 w-7 shrink-0 rounded-md shadow-sm"
                                     onClick={() => {
                                         const text = resolvedContent ?? ''
-                                        if (text) navigator.clipboard?.writeText(text).catch(() => {})
+                                        if (text) {
+                                            navigator.clipboard?.writeText(text).then(() => toast.success('Copied to clipboard')).catch(() => {})
+                                        }
                                     }}
                                     disabled={!resolvedContent}
                                     title="Copy raw output"