feat: integrate Playwright E2E test reports into GitHub Pages deployment

Add support for downloading and displaying Playwright E2E test reports
in the GitHub Pages deployment workflow. The reports are organized by
browser (chromium, chromium-2x, chromium-0.5x, mobile-chrome) and
presented via an interactive index page with test statistics.

Changes:
- Download Playwright reports from CI test runs (both triggered and latest)
- Organize reports into browser-specific directories
- Create interactive index page showing test stats (passed/failed/skipped/flaky)
- Integrate with existing .pages landing page

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

.github/workflows/release-pages.yml

@@ -96,6 +96,52 @@ jobs:
           workflow_conclusion: success
           path: ./.pages/vitest-reports
 
+      - name: Download Playwright E2E reports (source run)
+        id: fetch_playwright_trigger
+        continue-on-error: true
+        if: github.event_name == 'workflow_run' && github.event.workflow_run.name == 'Tests CI'
+        uses: dawidd6/action-download-artifact@v6
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          workflow: ci-tests-e2e.yaml
+          name_is_regexp: true
+          name: playwright-report-.*
+          run_id: ${{ github.event.workflow_run.id }}
+          path: ./playwright-reports-temp
+
+      - name: Download Playwright E2E reports (latest successful run on main)
+        continue-on-error: true
+        if: steps.fetch_playwright_trigger.outcome != 'success'
+        uses: dawidd6/action-download-artifact@v6
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          workflow: ci-tests-e2e.yaml
+          name_is_regexp: true
+          name: playwright-report-.*
+          branch: main
+          workflow_conclusion: success
+          path: ./playwright-reports-temp
+
+      - name: Organize Playwright reports by browser
+        if: always()
+        run: |
+          mkdir -p ./.pages/playwright-reports
+
+          # Move each browser report to its own directory
+          if [ -d "./playwright-reports-temp" ]; then
+            for dir in ./playwright-reports-temp/playwright-report-*; do
+              if [ -d "$dir" ]; then
+                browser_name=$(basename "$dir" | sed 's/playwright-report-//')
+                mkdir -p "./.pages/playwright-reports/${browser_name}"
+                cp -r "$dir"/* "./.pages/playwright-reports/${browser_name}/"
+              fi
+            done
+          fi
+
+      - name: Create Playwright reports index page
+        if: always()
+        run: node scripts/create-playwright-index.js
+
       - name: Build static assets (with artifact reuse)
         run: ./scripts/build-pages.sh