Aonsoku BasicAuth v0.14.0-ba.1

Public validation prerelease. Initial Aonsoku BasicAuth fork release with reverse-proxy BasicAuth support for the Electron desktop client. Manual desktop smoke testing passed against a protected server, including browsing, playlist access, cover art, and playback. Full BasicAuth release gates passed on the recreated real GitHub fork, including Traefik/Navidrome smoke harness and Windows packaging.