init-client.sx contains browser-only code (dom-listen, collect! cssx).
It was in sx/sx/ which load_sx_dir scans and evaluates server-side,
causing "Undefined symbol: dom-listen". Move to sx/init-client.sx
which is outside the component load path.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
