sx-browser.js grew past OS arg length limit for node -e. Write to
temp file instead. Also fix Sx global scope: Node file mode sets
`this` to module.exports, not globalThis, so the IIFE wrapper needs
.call(globalThis) to make Sx accessible to sx-test.js.
855 passed (2 pre-existing empty .sx file failures).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>