local-runtime.ts dynamically imports @fusion/engine, but it was missing from the
esbuild externals list (only @fusion/core and @fusion/dashboard were there). esbuild
followed the import and tried to bundle engine's transitive node-pty native .node
binaries, failing with "No loader is configured for .node files" — which broke every
desktop Windows EXE and macOS DMG build leg. Externalize @fusion/engine like the other
workspace packages; it resolves from node_modules at runtime.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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