ci(e2e): add Playwright smoke tests to deploy-test workflow

Completes Epic #37 remaining scope:
- playwright.ci.config.ts — targets localhost:3100 (already-running Docker
  app), testMatch restricted to smoke.spec.ts, HTML report on failure
- e2e/smoke.spec.ts — 5 tests: health endpoint, unauth redirect, signin
  page render, admin login redirect, app shell nav visible
- deploy-test.yml — seed admin user via docker exec, setup Node 20, install
  Playwright 1.49 + Chromium, run smoke tests, upload report artifact on failure

Co-Authored-By: claude-flow <ruv@ruv.net>

.github/workflows/deploy-test.yml

@@ -57,6 +57,34 @@ jobs:
           echo "$BODY"
           echo "$BODY" | grep '"status":"ok"'
 
+      - name: Seed admin user
+        run: |
+          docker compose exec -T app node /app/scripts/setup-admin.mjs \
+            --email admin@capakraken.dev \
+            --name "Admin" \
+            --password admin123
+
+      - name: Set up Node.js 20
+        uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+
+      - name: Install Playwright and Chromium
+        run: |
+          npm install -g @playwright/test@1.49
+          playwright install chromium --with-deps
+
+      - name: Run smoke tests
+        run: npx playwright test --config apps/web/playwright.ci.config.ts
+
+      - name: Upload Playwright report
+        if: failure()
+        uses: actions/upload-artifact@v4
+        with:
+          name: playwright-smoke-report
+          path: apps/web/playwright-report/
+          retention-days: 7
+
       - name: Show logs on failure
         if: failure()
         run: docker compose logs --tail=100