fix(SelectMenu): wrap content with FocusScope

Resolves #2657

src/theme/select-menu.ts

@@ -5,7 +5,8 @@ import select from './select'
 export default (options: Required<ModuleOptions>) => {
   return defu({
     slots: {
-      input: 'border-b border-(--ui-border)'
+      input: 'border-b border-(--ui-border)',
+      focusScope: 'flex flex-col min-h-0'
     }
   }, select(options))
 }