1ec3abf17a
Replace HistoryTree (DAG with branches, Graphviz rendering) with a flat chronological SnapshotTimeline. New UI features: split-view layout, snapshot compare/diff, cherry-pick restore of individual sequences or fields, auto-snapshots with debounce, and pin/filter support. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>