renderArenaStreakEntry now takes *DnDCharacter and reads c.Level
instead of AdventureCharacter.CombatLevel. renderArenaStatus drops
its unused *AdventureCharacter arg. Callers in handleArenaMenu /
handleArenaStatus updated; menu path uses ensureCharForDnDCmd to
fetch (or auto-migrate) the sheet. Tests switched accordingly.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>