fix: WCAG 2.1 AA a11y audit and Playwright gate

.github/workflows/ci.yml

@@ -22,6 +22,26 @@ jobs:
       - run: pnpm test:a11y
       - run: pnpm build
 
+  playwright-a11y:
+    name: Playwright A11y Gate
+    needs: build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: pnpm/action-setup@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 22
+          cache: pnpm
+      - run: pnpm install --frozen-lockfile
+      - run: pnpm build
+
+      - name: Install Playwright browsers
+        run: npx playwright install --with-deps chromium
+
+      - name: Run Playwright a11y tests
+        run: pnpm test:a11y:playwright
+
   lighthouse:
     name: Lighthouse Audit
     runs-on: ubuntu-latest