Add reproducible browser and accessibility gates

web/playwright.config.ts

@@ -0,0 +1,21 @@
+import { defineConfig } from '@playwright/test';
+
+export default defineConfig({
+  testDir: 'test/browser',
+  outputDir: 'test-results',
+  timeout: 60_000,
+  expect: { timeout: 10_000 },
+  fullyParallel: false,
+  workers: 1,
+  reporter: [
+    ['list'],
+    ['html', { outputFolder: 'playwright-report', open: 'never' }]
+  ],
+  use: {
+    baseURL: process.env.NUTHATCH_BROWSER_BASE_URL,
+    ignoreHTTPSErrors: true,
+    trace: 'retain-on-failure',
+    screenshot: 'only-on-failure',
+    video: 'retain-on-failure'
+  }
+});