test(sw): shared Playwright runtime resolver

packages/sw/tests/viewer-regression.browser.mjs

@@ -3,12 +3,11 @@
 // Element mode compares every .hm-sw-header / .hm-sw-property element; the full page is reported for information
 // (the 2026-10-19 follow-up changed the Story work-area background to the shared grid canvas on purpose).
 // Usage: node packages/sw/tests/viewer-regression.browser.mjs <base-storybook-url> <new-storybook-url> <out-dir>
-import { createRequire } from 'node:module'
 import { mkdir, writeFile } from 'node:fs/promises'
 import path from 'node:path'
+import { runtimeRequire } from './playwright-runtime.mjs'
 
-const runtime = process.env.SW_RUNTIME_MODULES ?? 'C:/Users/user/.cache/codex-runtimes/codex-primary-runtime/dependencies/node/node_modules'
-const require = createRequire(path.join(runtime, 'index.js'))
+const require = runtimeRequire()
 const { chromium } = require('playwright')
 const { PNG } = require('pngjs')
 const pixelmatch = require('pixelmatch').default ?? require('pixelmatch')