** The casino path now uses a single canonical event/session identity from the active event through withdrawal, scan, settlement, transaction lookup, and refreshed UI state.
1. WithdrawalView, ChipScanView, and SettlementPreviewView all accept a sessionId: UUID from the parent.
The casino UI had been built but the identifiers that connected the screens were wrong. WithdrawalView and SettlementPreviewView each called let sessionId = UUID() independently.
The vertical slice is the proof-of-life for the casino flow. Withdrawals and settlement now share one canonical event ID; the iOS code and the SQL agree on the room scope.
WithdrawalView, ChipScanView, and SettlementPreviewView all accept a sessionId: UUID from…
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