- Reduce feedback edge offset (140→80) for tighter layout
- Terminal nodes (start/end) now clickable when lit
- Unlit nodes have no cursor-pointer and ignore clicks
- Role nodes cycle through occurrences on repeated clicks
- Start node click scrolls to thread prompt
- End node click scrolls to bottom
- All records get data-record-index for scroll targeting
Ref: #247
xingyue
59b7e89028