One line under the handle in the user profile popover, from the presence the
SDK already receives (currently_active + last_active_ago): 'Active now',
'Active just now', 'Last active 12 min ago / 3 hours ago / yesterday / 5 days
ago / over a month ago'. Nothing is shown without presence data or for an
offline user with no timestamp (Hide Online Status users), so nothing new is
exposed; re-renders on the existing presence events, no polling. Wording
unit-tested; verified headless ('Active now' for an online member).
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PPmy3tPq869XDW4njjVaKA
