Publishes encrypted online settings backup keys against the production backup service. Keeps the desktop package and lockfile versions aligned for updater metadata and Windows artifacts.
Use the existing TLS-enabled downloader.24-music.de host under a dedicated reverse-proxy path so the backup API can be activated without introducing an unmanaged DNS dependency.
Add immutable client-encrypted settings snapshots with independent MDD2 capability keys so fresh installs can restore configuration without transferring backup files. Keep credentials encrypted end to end, preserve queues and history during import, and avoid exposing identifiers in request URLs or errors. Include the persistent API with quota, rate limits, crash-safe storage locking, durability checks, and end-to-end race and recovery coverage.
Set the application and lockfile versions to 2.0.0 so installed 1.7.233 clients recognize the new major release through the existing updater. Keep the cleaned public source history and GitHub update target unchanged.
