Use unified 16pt Dynamic Type body text, clearer Markdown spacing, and a shared reading column. Preserve transcript anchors across typography changes and bound tool command previews to two lines. Add layout and typography regression tests.
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.