Replace inferred BFS topology with confirmed end-device parents and active
router routes from ZHA and Zigbee2MQTT. Fail closed on ambiguous evidence,
preserve stale snapshots, and request routing tables without hover traffic.
Use solid LQI-coloured arrows, plan-scaled unknown-LQI outlines, and named
unplaced targets. Add provider/runtime/visual regression coverage.
Owner authorized author self-review and merge to dev while the review model
is unavailable; no release or issue closure is included.
Issue: #798
User-Visible: yes