hc connect speaks the protocol over stdin/stdout, so clients attach with
ssh <box> hc connect. That failed with "hc: command not found": the binary
installs to /root/.local/bin/herdr-core, which is neither on PATH in a
non-interactive shell nor named hc. The desktop app was unaffected since it
calls the absolute path it installed.
Symlinks both names into /usr/local/bin, restored by the go script, and
records the connection details a mobile client or app builder needs.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>