practice/deck_list returns the same wire shape as /deck/info (the client parses
both via DeckGroupListData), but only ever sent user decks — so a fresh account
saw no default decks and couldn't start a practice match.
Extract the /deck/info hydration into a shared IDeckListBuilder used by
/deck/info, /deck/my_list, and /practice/deck_list. Practice passes
padEmptySlots:false (deck *select*, not builder) — matches the prod practice
capture, which returns real decks unpadded plus the 8 per-class default decks
and per-class leader-skin settings. Retire the near-duplicate
PracticeDeckListResponse DTO in favor of the shared DeckListResponse.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Story emits story_chapter_finish:<main|limited|event>:<story_id>.
Practice emits practice_win:<difficulty>:<enemy_class_id> on win only.
Practice catalog rows use opponent NAMES (e.g. practice_win:elite:arisa)
not numeric class_ids, so captured catalog rows won't match yet. The
infrastructure is in place; bridging numeric→name is a follow-up.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
