ci: add Playwright smoke job to GitHub Actions

.github/workflows/ci.yml

@@ -39,3 +39,41 @@ jobs:
 
       - name: Run accessibility smoke tests
         run: pnpm run test:a11y
+
+  smoke-test:
+    name: Smoke Test
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: 10.32.1
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+          cache: "pnpm"
+
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
+
+      - name: Cache Playwright browsers
+        uses: actions/cache@v4
+        id: playwright-cache
+        with:
+          path: ~/.cache/ms-playwright
+          key: ${{ runner.os }}-playwright-${{ hashFiles('**/pnpm-lock.yaml') }}
+          restore-keys: |
+            ${{ runner.os }}-playwright-
+
+      - name: Install Playwright browsers
+        if: steps.playwright-cache.outputs.cache-hit != 'true'
+        run: pnpm exec playwright install --with-deps
+
+      - name: Run Playwright tests
+        run: pnpm run test:e2e

CONTRIBUTING.md

@@ -105,6 +105,7 @@ you may need these additional environment variables. Add them to your local `.en
 - [ ] Keep the PR focused on one concern.
 - [ ] Run `pnpm lint` and fix reported issues.
 - [ ] Run `pnpm test:unit` for unit coverage.
+- [ ] Run `pnpm test:e2e` to ensure Playwright smoke tests pass.
 - [ ] Run `pnpm build` for the TypeScript/Vite production build.
 - [ ] Include screenshots or a short screen recording for visible UI changes.
 - [ ] Mention any env vars, migrations, or manual QA steps reviewers need.