- Pin formatDate to timeZone: 'UTC' so server and client produce identical date strings (fixes React error #418) - Add one-shot service worker unregistration since SpiceBook doesn't use one — clears phantom registrations from browser cache
- Pin formatDate to timeZone: 'UTC' so server and client produce identical date strings (fixes React error #418) - Add one-shot service worker unregistration since SpiceBook doesn't use one — clears phantom registrations from browser cache