Merge sx-tools: test coverage + bug fixes + Playwright fixes
- 7 new test files (~268 tests): stdlib, adapter-html, adapter-dom,
boot-helpers, page-helpers, layout, tw-layout
- Fix component-pure? transitive scan, render-target crash on unknown
components, &rest param binding (String vs Symbol), swap! extra args
- Fix 5 Playwright marshes tests: timing + test logic
- 2522/2522 OCaml tests, 173/173 Playwright tests
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
# Conflicts:
# shared/static/wasm/sx/orchestration.sxbc
# shared/static/wasm/sx_browser.bc.js
# shared/static/wasm/sx_browser.bc.wasm.js
# sx/sx/not-found.sx
# tests/playwright/isomorphic.spec.js