fix(timeline): diff-based UI updates to address Android freeze#131

Draft

TigerInYourDream wants to merge 3 commits into

mainfrom

Commits on May 7, 2026

fix(timeline): replace full snapshots with diff batches and bound UI work
TigerInYourDream
committed
chore(clippy): use struct literal in AppState test fixtures
TigerInYourDream
committed
docs(spec): add Android timeline freeze task contract
TigerInYourDream
committed