feat(ci): Add native test result summaries

Enhances CI workflow with automated reporting for better visibility:

**Native Test Result Summaries:**
- Adds GitHub job summary showing test pass/fail status
- Displays formatted table with total/passed/failed test counts
- Uses only native GitHub features ($GITHUB_STEP_SUMMARY)
- No third-party actions required for test reporting

**Benefits:**
- Test results summary on workflow run page
- Maintains existing artifact upload for manual inspection
- All reporting uses native or org-approved tools

Author: hristoterezov

.github/workflows/ci.yml

@@ -38,7 +38,41 @@ jobs:
       run: npm ci
 
     - name: Run tests with coverage
-      run: npm run test:coverage
+      run: |
+        npm run test:coverage 2>&1 | tee test-output.log
+        echo "TEST_EXIT_CODE=${PIPESTATUS[0]}" >> $GITHUB_ENV
+
+    - name: Generate test summary
+      if: always()
+      run: |
+        echo "### Test Results 📊" >> $GITHUB_STEP_SUMMARY
+        echo "" >> $GITHUB_STEP_SUMMARY
+
+        # Extract test results from web-test-runner output
+        # Format: "Chrome: |████| 7/7 test files | 182 passed, 0 failed"
+        if grep -q "passed" test-output.log; then
+          # Extract pass/fail counts from the progress line
+          PASSED=$(grep -oP '\d+ passed' test-output.log | tail -1 | grep -oP '\d+' || echo "0")
+          FAILED=$(grep -oP '\d+ failed' test-output.log | tail -1 | grep -oP '\d+' || echo "0")
+          TOTAL=$((PASSED + FAILED))
+
+          if [ "$FAILED" = "0" ]; then
+            echo "✅ **All tests passed!**" >> $GITHUB_STEP_SUMMARY
+          else
+            echo "❌ **Some tests failed**" >> $GITHUB_STEP_SUMMARY
+          fi
+
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "| Metric | Count |" >> $GITHUB_STEP_SUMMARY
+          echo "|--------|-------|" >> $GITHUB_STEP_SUMMARY
+          echo "| Total Tests | $TOTAL |" >> $GITHUB_STEP_SUMMARY
+          echo "| Passed | $PASSED |" >> $GITHUB_STEP_SUMMARY
+          echo "| Failed | $FAILED |" >> $GITHUB_STEP_SUMMARY
+        else
+          echo "⚠️ Could not parse test results" >> $GITHUB_STEP_SUMMARY
+        fi
+
+        exit $TEST_EXIT_CODE
 
     - name: Upload coverage to Codecov
       uses: codecov/codecov-action@v4