Each saved set for the selected node is a card with the picture made with
its values (or the kept picture it came from) and a line per source: a
workflow's parameter set (with how many pictures it made, Open shows that
set), a kept picture (See it), or saved here, with the day. Changes are
drawn: numbers as two bars with an arrow, choices as old -> new; what stays
says why; Show all lists every value. Compare opens the whole workflow
against the canvas. With two sets or more, a side-by-side table (picture on
top of each column, changed values marked, Use N under each).
Backend: materials/by_node_type tells each record's origin, kept picture and
preview; parameters/by_node_type gives each set's signature; new GET
/anomalous/parameter_pictures counts the pictures of many sets in one pass,
reading each picture's signature once per file version.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
