🖼️ style: Conversation Menu and Dialogs update (#3601)

* feat: new dropdown

* fix: maintain popover active when open

* fix: update DeleteButton and ShareButton component to use useState for managing dialog state

* BREAKING: style improvement of base Button component

* style: update export button

* a11y: ExportAndShareButton

* add border

* quick style fix

* fix: flick issue on convo

* fix: DropDown opens when renaming

* chore: update radix-ui/react-dropdown-menu to latest

* small fix

* style: bookmarks update

* reorder export modal

* feat: imporved dropdowns

* style: a lot of changes; header, bookmarks, export, nav, convo, convoOptions

* fix: small style issues

* fix: button

* fix: bookmarks header menu

* fix: dropdown close glitch

* feat: Improve accessibility and keyboard navigation in ModelSpec component

* fix: Nav related type issues

* style: ConvoOptions theming and focus ring

---------

Co-authored-by: Danny Avila <danny@librechat.ai>

client/src/components/SidePanel/Nav.tsx

@@ -84,7 +84,7 @@ export default function Nav({ links, isCollapsed, resize, defaultActive }: NavPr
                                 variant === 'default'
                                   ? 'dark:bg-muted dark:hover:bg-muted dark:text-white dark:hover:text-white'
                                   : '',
-                                'hover:bg-gray-50 data-[state=open]:bg-gray-50 data-[state=open]:text-black dark:hover:bg-gray-700 dark:data-[state=open]:bg-gray-700 dark:data-[state=open]:text-white',
+                                'hover:bg-gray-200 data-[state=open]:bg-gray-200 data-[state=open]:text-black dark:hover:bg-gray-700 dark:data-[state=open]:bg-gray-700 dark:data-[state=open]:text-white',
                                 'w-full justify-start rounded-md border dark:border-gray-700',
                               )}
                               onClick={(e) => {