Persist tone samples, KV, and snoozes across hard refresh on Flutter
web. Keep AppDatabase.memory ephemeral; document DataFlow copy and
mark N4-W1 done. Unit tests cover prefs round-trip and corrupt JSON.
Co-authored-by: okuma <o0kuma@users.noreply.github.com>
Land W0–W7 design for the Flutter web preview surface with
acceptance criteria, Master actions, and N4-W tracking. Cross-link
README, roadmap, deploy-checklist, fcm-setup, and mobile README.
Q9 remains out of scope; implementation waits per-Wi approval.
Co-authored-by: okuma <o0kuma@users.noreply.github.com>