The status-bar quip used to rotate every 2.5s through
funnyWorkingLines while a turn ran. On a long response that
meant five or six different phrases during one reply, which
reads as activity that isn't actually happening (the model is
just still streaming the same answer).
Start() now picks a random index once, Message() returns that
same index until the next Start(). Next turn picks a different
phrase so the set still feels varied across a session.
Dropped the unused lastSwap timer field that drove the rotation
and its assignments in Start/StartFixed.