Settings
User control starts with theme and data boundaries.
This page will expand into profile, 2FA, billing, export, and delete-account controls.
Appearance
Default follows the device setting. A user can force dark or light mode here.
Mobile reminders
The web version can start as a PWA; native push can use the same morning and evening reminder records later.
Morning sleep check
Ask how sleep was
Evening supplement check
Ask what was taken
Security placeholder
Phase 6 will add TOTP setup, audit logs, and privacy controls.