refactor: 端口策略+探针弹框改用shadcn Dialog，无黑色蒙布居中弹出

frontend/src/components/ui/dialog.tsx

@@ -48,13 +48,15 @@ function DialogContent({
   className,
   children,
   showCloseButton = true,
+  showOverlay = true,
   ...props
 }: React.ComponentProps<typeof DialogPrimitive.Content> & {
   showCloseButton?: boolean
+  showOverlay?: boolean
 }) {
   return (
     <DialogPortal data-slot="dialog-portal">
-      <DialogOverlay />
+      {showOverlay && <DialogOverlay />}
       <DialogPrimitive.Content
         data-slot="dialog-content"
         className={cn(