1# PIN Storage Security Remediation23- [x] Investigation evidence collected.4- [x] Official Android Keystore behavior verified.5- [x] Implement hardware-backed PIN envelope and limited-use attempt gates.6- [x] Add focused tests and version bump.7- [x] Run full unit tests, lint, and release builds.8- [ ] Complete real-device validation and publish device-tier guarantees.910## Checkpoint1112- [ ] No ordinary-storage PIN-derived value can decrypt or validate the vault without Keystore hardware.13- [ ] StrongBox/TEE/unsupported behavior is evidenced on real devices.