- StoryConfig.ClassXpPerClear retired; equivalent knob moves to
BattleXpConfig.StoryXpPerClear (falls back to XpPerWin when null).
- StoryService.FinishAsync now grants class XP via IBattleXpService with
BattleXpMode.Story on the firstClear && isPlayShape branch. Persists
post-grant Level/Exp to Viewer.Classes.
- Wire fields (get_class_experience, class_level) stringified as before.
- StoryConfig kept as an empty [ConfigSection] for future story-specific
knobs. StoryServiceTests updated to reflect the new default path
(XpPerWin=100 crosses classexp.csv L1=50 → L2 with 50 carry).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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