Added GitHub Actions workflows for macOS and Linux desktop release artifacts (`release.yml` and `test-release.yml`), wired in new `dist` scripts across platforms, and extended test coverage for electron-builder config and release workflow logic, with updated documentation for the new artifacts. Fusion-Task-Id: FN-5603 Co-authored-by: Fusion (runfusion.ai) <noreply@runfusion.ai> Fusion-Task-Id: FN-5603