feat: run Playwright accessibility scan on pull requests

.github/workflows/a11y.yml

@@ -0,0 +1,42 @@
+name: Accessibility
+
+on:
+  pull_request:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+
+jobs:
+  a11y:
+    name: Playwright a11y scan
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    steps:
+      - name: Checkout your repository using git
+        uses: actions/checkout@v6
+      - name: Setup Node.js
+        uses: actions/setup-node@v6
+        with:
+          node-version: 24
+      - name: Install dependencies
+        run: npm ci
+      - name: Install Playwright browser
+        run: npx playwright install --with-deps chromium
+      - name: Run accessibility tests
+        env:
+          SKIP_BUILD_COMPRESS: 1
+          NODE_OPTIONS: "--max_old_space_size=4096"
+        run: npm run test:a11y
+      - name: Upload Playwright report
+        if: ${{ !cancelled() }}
+        uses: actions/upload-artifact@v4
+        with:
+          name: playwright-report
+          path: |
+            playwright-report/
+            test-results/
+          retention-days: 14

playwright.config.ts

@@ -2,16 +2,25 @@ import { defineConfig, devices } from "@playwright/test";
 
 const PORT = 4321;
 const BASE_URL = `http://localhost:${PORT}`;
+const isCI = Boolean(process.env.CI);
 
 export default defineConfig({
   testDir: "./test/a11y",
   testMatch: "**/*.spec.ts",
   outputDir: "./test-results",
   fullyParallel: true,
-  reporter: [
-    ["list"],
-    ['html', { outputFolder: 'playwright-report', open: 'never' }]
-  ],
+  forbidOnly: isCI,
+  retries: isCI ? 1 : 0,
+  reporter: isCI
+    ? [
+        ["github"],
+        ["list"],
+        ["html", { outputFolder: "playwright-report", open: "never" }],
+      ]
+    : [
+        ["list"],
+        ['html', { outputFolder: 'playwright-report', open: 'never' }]
+      ],
 
   use: {
     baseURL: BASE_URL,
@@ -34,10 +43,11 @@ export default defineConfig({
   ],
 
   webServer: {
-    command: "npm run dev",
+    command: isCI ? "npm run build && npm run preview" : "npm run dev",
     url: BASE_URL,
-    reuseExistingServer: true,
-    timeout: 180_000,
+    reuseExistingServer: !isCI,
+    timeout: isCI ? 900_000 : 180_000,
+    stdout: isCI ? "pipe" : "ignore",
     env: {
       A11Y_TEST: "1",
     },