test(e2e): add Playwright E2E tests

.github/workflows/pr-check.yaml

@@ -45,3 +45,31 @@ jobs:
         run: pnpm install --frozen-lockfile
       - name: Build
         run: pnpm build
+
+  e2e:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: 10
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: 24
+          cache: pnpm
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
+      - name: Install Playwright browsers
+        run: pnpm exec playwright install --with-deps chromium
+      - name: Run E2E tests
+        run: pnpm e2e
+      - name: Upload Playwright report on failure
+        if: failure()
+        uses: actions/upload-artifact@v4
+        with:
+          name: playwright-report
+          path: playwright-report/
+          retention-days: 7

.gitignore

@@ -20,3 +20,8 @@ docs/superpowers/screenshots/
 
 # paraglide-js generated
 src/paraglide/
+
+# Playwright
+test-results/
+playwright-report/
+playwright/.cache/