- Throw ServiceException when page RPC fails (align with zoneTree branch) - Guard null page data; rowsOfPage=1 for totalRows-only reads - Document walkthrough sign-off and status in 走查任务与状态 §5 Made-with: Cursor
- Add 走查任务与状态: per §3.1–3.5 subtask bounds, next fixes vs blocked items - Link from 约定 doc; scope wording; docs/README architecture links - listFloor: note missing page.isSuccess per §2.2 Made-with: Cursor