/api/v1/nodes has no design filter, so list_zones reported every
design's zones and add_to_zone would happily parent a node from design B
under a zone on design A — which hides it on the canvas it belongs to.
list_zones takes an optional design_id and reports each zone's own, and
add_to_zone skips a node whose design differs from the zone's, alongside
the other skip rules. remove_from_zone needs neither: a node and the
zone it sits in are on the same design by construction.
ha-relevant: no
Pouzor
efcafee774