The headless engine accumulates spell-charge for real on the receive path
(each spell play runs the played card's own AddSpellChargeCount) and resolves
the discounted cost by construction, so the wire-derived spellboost-count
bookkeeping is redundant. Engine-source the knownList spellboost COUNT too
(prod-faithful) via a new SessionBattleEngine.PlayedCardSpellboost, using the
same persist-post-play zone search as PlayedCardCost (SpellChargeCount survives
PlayCard; only ctor/ReturnCard zero it).
- Delete IdxToSpellboost/SpellboostMap/GetSpellboostMap/RecordSpellboostFrom
(BattleSessionState) and MineAlterSpellboosts (KnownListBuilder); token/choice/
copy identity maps are untouched.
- BuildPlayedCard takes an engine-sourced spellboost int (drops spellboostMap).
- Seed BattleLogManager fusion lists headless (the per-frame filter cleanup
NREs on null EnemyFusionCard when a fanfare card registers a CalledCreateFilter)
so real spell-charge grantor plays resolve.
- Add committed real-charge regression tests (no SeedHandCardSpellboostCost seam):
one grantor play accumulates +1 on the reducer -> cost 5->4, count 1, persisting
post-play; handler emits cost 4 + spellboost 1 engine-sourced.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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