Receive feeds the decoded frame into the mgr's own NetworkBattleReceiver
(isHaveSequence:true, checkBreakData:false — mirroring the engine's
RecoveryDataHandler frame replay), reboxing object?->object for nested data.
No engine gaps surfaced; the only fix was a test-harness one (load all deck ids
in a single HeadlessCardMaster.Load — per-id calls each replace the master).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
6740313446