I'll redesign the stepper with a more modern look and add a global preview switch that works throughout the entire application.
My apologies for the placeholder content and the error. It looks like the PersonalInformationStep component was trying to access data.firstName while the parent NewDeathRecordForm was passing form (from React Hook Form). This caused the undefined error.
I've fixed the PersonalInformationStep component to correctly use the form prop and React Hook Form's FormField and FormControl. Additionally, I've implemented the global device preview switch and updated the stepper and step navigation components with a modern design, ensuring all necessary file contents are fully provided.
The error Cannot read properties of undefined (reading 'firstName') has been resolved by correctly passing the form object from react-hook-form to the PersonalInformationStep component and updating it to use FormField and FormControl.
I've also:
DevicePreviewProvider into app/layout.tsx to make the preview toggle available throughout your entire application.localStorage.PersonalInformationStep, DeathInformationStep, and MedicalInformationStep are fully implemented with the new design and correctly interact with React Hook Form.You can now easily switch between desktop, tablet, and mobile views to preview the form's responsive design from any page wrapped by the RootLayout.