Due to the async nature of markdown parsing, sometimes subagent cards would not scroll fully to the bottom of the content because the scroll_to_bottom function was being called just while the agent was running... and sometimes, it'd finish running before the markdown had fully finished parsing. The solution is to remove the is_running conditional.

Release Notes:

• Agent: Improved auto-scroll of subagent content in preview cards, ensuring the content is always visible until the end.