Edges
- Z2M `links` is bidirectional and includes router mesh paths, which
caused duplicate edges and edges entering the coordinator from the
bottom. Walk `links` only to derive parent_id + LQI; build final
edges strictly from the parent->child hierarchy (one edge per
non-coordinator node). Result: parent bottom -> child top, every time.
- Tests: bidirectional pair collapses to one edge, router-mesh siblings
dropped, coordinator never receives an edge.
Auto-select
- After import, deselect existing canvas nodes and mark only the
freshly-imported ones as selected, so the user can drag the whole
subtree as a group.
Pouzor
05db9a59f5