A bot created moments before the room runs its canonical-chat intro turn in
the background (create-dialog.tsx createCanonicalChat kickoff); when it
lands, the roster fronts that bot's chat tab and yanks the center away from
the room, so a room-content assertion sees the reply as hidden or the
Activity button as missing and fails on an unrelated visibility check. Both
specs now re-select the room tab inside the wait, like the approval spec.
abbcdc0104