- Add notify_new_chapters_push field to AppUser, PATCH /api/profile, and profile loader
- Fix bell panel to reload notifications on every open (not just once on mount)
- Replace flat in-app + push toggles with structured category table (Category | In-app | Push)
- Add browser push master subscribe/unsubscribe row above the table
- Push column toggle disabled until browser is subscribed; shows — when unsupported/denied
- Update Notifications row hint to summarise active channels (In-app · Push / Off)