Move classifier/js/seltable.js → shared/seltable.js so both the classifier and
the tables tool can use it (the MDL realignment splits work across both). Adds
per-column autofilter inputs (one per column, AND-combined) on top of the
programmatic global filter; selection + select-filtered + ctrl-Enter unchanged.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
