7ae82e1d5d
handleDiskEject now resolves the authoritative role of the storage at `where` and refuses 403 (no Unmount) unless it is user-data. Fails safe to protected on ambiguity. Adds roleForMountPath + an injectable HostReader seam for testability. TestEject_RoleGated asserts protected mounts are refused with no Unmount. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>