layout and opacity_1/opacity_2 are gone from the schema; mode stays a real
node input (as directed).
Python: with no layout to branch on, every run exports BOTH view sets -- the
separate pair (side_by_side / slider) and the combined overlay file -- using
the same untouched export helpers (_export_mesh, _export_combined_mesh; the
combined helper just loses its never-used opacity params). ui_data carries
both file sets; opacity keys dropped (Python only ever echoed them);
common_fields_overlay added (the combined export injects mesh_id).
JS: layout and opacities move into viewerState (persisted via the DOM
widget's serialization, like show_edges already was). Every layout switch is
now CLIENT-SIDE -- overlay included, since its file always exists -- and
opacity changes re-post immediately. Only a mode change re-runs (different
export format). No widgets are hidden; mode renders as a normal node input.
Cost: one extra combined export per run. Old workflows whose saved widget
values included layout/opacity load with those values ignored.
PozzettiAndrea
fe3c01f585