cms-server/client/cms/.sisyphus/notepads/implement-checkin-logic/learnings.md

useCheckinSubmit Hook

• Created src/hooks/data/useCheckinSubmit.ts using postEventCheckinSubmitMutation from @/client/@tanstack/react-query.gen.
• Integrated sonner for success and error toasts.
• Followed the pattern from useJoinEvent.ts.

CheckinScannerNav Implementation

• CheckinScannerNavView validation logic implemented with regex ^\d{6}$.
• CheckinScannerNavContainer connects the hook to the view.
• Type checking passed with bun tsc -b.