Build the navigation map from one entry per subplot. Each entry's layers
are matched to its grouped live series by type and order (avoiding any
dependence on the exact generated ID strings), and all resolvers merge into
one layerId-keyed map — layer ids are unique across the whole figure.
Build the navigation map from one entry per subplot. Each entry's layers are matched to its grouped live series by type and order (avoiding any dependence on the exact generated ID strings), and all resolvers merge into one layerId-keyed map — layer ids are unique across the whole figure.