The tag-triggered release pipeline built the demo (and backed editor)
without --models-tag, so modelsSourceConfig() returned null and every
kind=model3d ensure logged "(unserved)" — 3D component models never
loaded on demo.pcbjam.com. The manual deploy-demo.yml already passed
it; mirror its MODELS_TAG env (10.0.3) in release.yml for both builds.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UQRBzfidkoTU5yc7HnF9x7