PlayActionsHandler + EchoHandler now call RecordCopyTokensFrom (ordered
after plain/choice mining) to resolve a copy add's baseIdx against the
side's live idx->cardId map and record copyIdx->cardId. A copy played in a
later (or same) frame synthesizes a knownList instead of degrading.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>