DOC Card Differ / Lineage decode + diff two cards + pedigree against the breeding pool

Drop two horse files — either the new .card (207 bytes) or the old .raw card-reader export; US World-Edition or JP identity, both decode the same. Everything runs locally in your browser — nothing is uploaded. Decoder is a JS port of doc_card.py (selftest 11/11 byte-exact); lineage joins sire/dam to the embedded breeding pool (all 4 versions).