refac: navbar styling

src/lib/components/layout/Sidebar/UserMenu.svelte

@@ -28,7 +28,7 @@
 
 	<slot name="content">
 		<DropdownMenu.Content
-			class="w-full max-w-[240px] rounded-lg p-1 py-1 border border-gray-850 z-50 bg-gray-850 text-white text-sm"
+			class="w-full max-w-[240px] rounded-lg p-1 py-1 border border-gray-300/30 dark:border-gray-700/50 z-50 bg-gray-850 text-white text-sm"
 			sideOffset={8}
 			side="bottom"
 			align="start"