Doubles the shipped defaults across all modes without touching per-mode
overrides. Curve interaction against classexp.csv (L1=50, L2=150):
- Win (200 XP): crosses both L1 + L2 → land at L3, Exp=0
- Loss (50 XP): exactly meets L1 → land at L2, Exp=0
Updates every affected test assertion (Practice, Rank, Free, TK2,
Colosseum, Story) for the new level/exp math.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Adds BattleXpConfig ([ConfigSection("BattleXp")]) with global
XpPerWin/XpPerLoss plus per-mode nullable overrides. Adds BattleXpMode
enum and IViewerRepository.LoadForBattleXpGrantAsync — focused tracked
load with viewer.Classes + Class nav ref included, for the service
about to be introduced.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
