• Fix: Preserve web row order and focus, and keep pinned rows updated.
• Fix: End-following, sticky offsets, and edge callbacks after geometry or data changes.
• Fix: Preserve anchors through prepends and prevent duplicate pending edge requests.
• Fix: Keep wheel scrolling responsive.
• Fix: Prevent native geometry corrections from inventing velocity or reversing the render buffer.
• Perf: Reduce rendering work through directional buffers, reused size estimates, and faster initial indexing.