ui: Fix operator dropdown not opening in SimpleMatchers (#6212)

Add min-h-[100px] to dropdown container so the virtualizer can measure
its dimensions on first render.

The virtualizer needs container height to calculate which items to show.
Without min-height, the empty container had 0 height, causing the
virtualizer to render 0 items (chicken-and-egg problem).

Author: yomete

ui/packages/shared/profile/src/SimpleMatchers/Select.tsx

@@ -323,7 +323,7 @@ const CustomSelect: React.FC<CustomSelectProps & Record<string, any>> = ({
         <div
           ref={optionsRef}
           className={cx(
-            'absolute z-50 mt-1 max-h-[50vh] w-max overflow-auto rounded-md bg-gray-50 text-base shadow-lg ring-1 ring-black ring-opacity-5 focus:outline-none dark:border-gray-600 dark:bg-gray-900 dark:ring-white dark:ring-opacity-20 sm:text-sm',
+            'absolute z-50 mt-1 min-h-[100px] max-h-[50vh] w-max overflow-auto rounded-md bg-gray-50 text-base shadow-lg ring-1 ring-black ring-opacity-5 focus:outline-none dark:border-gray-600 dark:bg-gray-900 dark:ring-white dark:ring-opacity-20 sm:text-sm',
             {[optionsClassname]: optionsClassname.length > 0}
           )}
           role="listbox"