Bun's subprocess management hangs when Playwright calls chromium.launch()
on Windows. This replaces Bun-specific APIs with cross-runtime equivalents
so the server works under both Bun (Unix) and Node (Windows):
- Replace Bun.serve() with node:http createServer (works in both runtimes)
- Replace Bun.serve() port scanning with node:net createServer
- On Windows, spawn server via node:child_process with detached:true
(Bun.spawn + unref doesn't properly orphan on Windows)
- Build step now also bundles server.js for Node via --target node
- Fix resolveServerScript() dev-mode check for Windows paths
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
DanMcInerney
Garry Tan