Hibiscus 0.8.12

Fixes an issue where a paid license or 7-day trial could be accepted by the server but fail to unlock Hibiscus on some Macs.

Activation now safely falls back to a compatible encrypted Keychain store when macOS rejects the preferred Keychain write, and displays a clear secure-storage message if saving still fails.

Existing purchases remain valid. If activation previously failed, install this update and activate again with the same license key.