fix(release): package embeddable chat module

[vernonstinebaker]

Summary

• include the dist/ embeddable module artifacts in release archives when present
• verify that release packages contain module.js in addition to the runnable static app bundle

Why

NullHub embeds nullclaw-chat-ui by dynamically importing /ui/<module>@<version>/module.js. The existing release packaging only shipped the static build/ app and CLI launcher, so NullHub could install the package but not load the embeddable module entrypoint. That left the chat tab failing with Failed to load module: Importing a module script failed.

Validation

• npm run build
• npm run build:module
• bash ./scripts/package-release.sh vtest-pr release
• bash ./scripts/verify-release-package.sh vtest-pr release
• local NullHub smoke after installing the rebuilt package:
  • GET /ui/nullclaw-chat-ui@latest/module.js -> 200 OK
  • confirmed chat tabs load for default and willy-nilly

Notes

• this is the release-packaging half of the chat fix
• the corresponding NullHub installer compatibility fix is submitted separately