Hide rows that have no effect (items box when a file is used, file
dropdown when file_path is set, control_after_generate when seed is
wired) and always hide `enabled`, switching old `enabled = false` nodes
to bypass. Pinned nodes get a gold outline and a pin badge, and the
preview shows pinned / skipped (chance) / empty from a new ui.status.
Also repair workflows saved before min_count/max_count existed, whose
widget values load shifted by one slot (seed = "randomize" -> NaN).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
