test(sw): shared Playwright runtime resolver

packages/sw/tests/integrated-visual.browser.mjs

@@ -3,13 +3,12 @@
 // compare: pixel-diffs two capture directories and writes compare-result.json.
 // Usage: node packages/sw/tests/integrated-visual.browser.mjs capture <dir>
 //        node packages/sw/tests/integrated-visual.browser.mjs compare <before-dir> <after-dir> <out-dir>
-import { createRequire } from 'node:module'
 import { mkdir, readFile, readdir, writeFile } from 'node:fs/promises'
 import path from 'node:path'
 import http from 'node:http'
+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 [mode, a, b, c] = process.argv.slice(2)
 
 // Stories that existed before the improvement; IDs are fixed so new Stories never enter the comparison.