* fix: zulip stream and topic selection in share dialog
Replace useListCollection with createListCollection to match the working
room edit implementation. This ensures collections update when data loads,
fixing the issue where streams and topics wouldn't appear until navigation.
* fix: wrap createListCollection in useMemo to prevent recreation on every render
Both streamCollection and topicCollection are now memoized to improve performance
and prevent unnecessary re-renders of Combobox components