Add viewport-driven paging with layout acknowledgements, bounded retries, cancellation gates, and epoch-safe history retention.
Preserve transcript anchors and expansion state, fix tool-group identity collisions, and serialize Android history coordination on Main.
Reduce per-scroll composition and layout work; add native regression tests, CI coverage, and profiling guidance.
Constrain transcript rows to the viewport and replace competing scroll anchors with measured tail corrections. Preserve following through media resizing and reset scroll state when the transcript remounts.
Gate history paging on reader gestures and cover tail-following behavior with seven regression tests.