migration to vite/playwright

tests/e2e/fixtures.js

@@ -0,0 +1,20 @@
+import { test as base, expect } from '@playwright/test'
+import fs from 'node:fs'
+import path from 'node:path'
+
+// Playwright fixture that captures Istanbul coverage from instrumented builds.
+export const test = base.extend({
+  page: async ({ page }, use, testInfo) => {
+    await use(page)
+    const coverage = await page.evaluate(() => globalThis.__coverage__ || null)
+    if (!coverage) return
+
+    const nycDir = path.join(process.cwd(), '.nyc_output')
+    fs.mkdirSync(nycDir, { recursive: true })
+    const slug = testInfo.title.replace(/[^\w-]+/g, '_')
+    const file = path.join(nycDir, `playwright-${slug}.json`)
+    fs.writeFileSync(file, JSON.stringify(coverage))
+  }
+})
+
+export { expect }