feat: Implement Playwright testing setup

.github/workflows/playwright.yml

@@ -0,0 +1,81 @@
+name: Playwright E2E Tests
+
+on:
+  push:
+    branches: [main, develop]
+  pull_request:
+    branches: [main, develop]
+
+jobs:
+  test:
+    timeout-minutes: 60
+    runs-on: ubuntu-latest
+    
+    strategy:
+      fail-fast: false
+      matrix:
+        browser: [chromium, firefox, webkit]
+    
+    steps:
+      - uses: actions/checkout@v4
+      
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 18
+          cache: 'npm'
+      
+      - name: Install dependencies
+        run: npm ci
+      
+      - name: Install Playwright Browsers
+        run: npx playwright install --with-deps ${{ matrix.browser }}
+      
+      - name: Run Playwright tests
+        env:
+          SUPABASE_SERVICE_ROLE_KEY: ${{ secrets.SUPABASE_SERVICE_ROLE_KEY }}
+          TEST_USER_EMAIL: ${{ secrets.TEST_USER_EMAIL }}
+          TEST_USER_PASSWORD: ${{ secrets.TEST_USER_PASSWORD }}
+          TEST_MODERATOR_EMAIL: ${{ secrets.TEST_MODERATOR_EMAIL }}
+          TEST_MODERATOR_PASSWORD: ${{ secrets.TEST_MODERATOR_PASSWORD }}
+          BASE_URL: ${{ secrets.BASE_URL || 'http://localhost:8080' }}
+        run: npx playwright test --project=${{ matrix.browser }}
+      
+      - name: Upload test results
+        uses: actions/upload-artifact@v4
+        if: always()
+        with:
+          name: playwright-results-${{ matrix.browser }}
+          path: test-results/
+          retention-days: 30
+      
+      - name: Upload Playwright report
+        uses: actions/upload-artifact@v4
+        if: always()
+        with:
+          name: playwright-report-${{ matrix.browser }}
+          path: playwright-report/
+          retention-days: 30
+      
+      - name: Comment PR with results
+        uses: daun/playwright-report-comment@v3
+        if: always() && github.event_name == 'pull_request'
+        with:
+          report-path: test-results.json
+
+  test-summary:
+    name: Test Summary
+    runs-on: ubuntu-latest
+    needs: test
+    if: always()
+    
+    steps:
+      - name: Download all artifacts
+        uses: actions/download-artifact@v4
+      
+      - name: Generate summary
+        run: |
+          echo "## Playwright Test Results" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "Tests completed across all browsers." >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "See artifacts for detailed reports and screenshots." >> $GITHUB_STEP_SUMMARY