Under the hood
Useful3 Signal1
Transcript scrolling and timed checks were rewritten to avoid stale callbacks and overlapping runs.
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What
Transcript scroll and seek handlers, the global-state subscriber and the sticky-prompt context moved off ref-held callbacks onto React's effect-event hook, and a self-rescheduling timer helper replaced the old interval utility, including the 30-minute update check. This removes stale-closure and overlapping-run hazards.
Evidence
useEffectEvent
Strings lifted out of the shipped bundle, so the claim above can be checked against them.