refactor: v3 ui slots connection dots (#5316)

* refactor: v3 ui slots connection dots

* fix: use the new useTemplateRef

* fix: slot dark-theme border and hover styles

---------

Co-authored-by: Christian Byrne <cbyrne@comfy.org>

src/utils/tailwindUtil.ts

@@ -1,6 +1,8 @@
 import clsx, { type ClassArray } from 'clsx'
 import { twMerge } from 'tailwind-merge'
 
+export type { ClassValue, ClassArray, ClassDictionary } from 'clsx'
+
 export function cn(...inputs: ClassArray) {
   return twMerge(clsx(inputs))
 }