Builds the chronological thread (caption turns + done delegation cards, oldest first)
for a reviewed session — the items RealtimeSessionState.LoadHistoricalItems takes.
CHAIN-AWARE: when the review carries multiple RealtimeSessionReview.Legs, each
leg's items render in leg order with a divider item between legs ("Session leg
started ·
Builds the chronological thread (caption turns + done delegation cards, oldest first) for a reviewed session — the items
RealtimeSessionState.LoadHistoricalItemstakes.CHAIN-AWARE: when the review carries multiple RealtimeSessionReview.Legs, each leg's items render in leg order with a
divideritem between legs ("Session leg started ·