Fix bug where details and carbon data were overwritten in runner.js

lib/runner.js

@@ -251,25 +251,8 @@ async function _executeTest(url, options) {
     // Use High-Res frames if available, otherwise fallback to Lighthouse thumbnails
     const filmstripData = (highResFrames && highResFrames.length > 5) ? highResFrames : (lhr.audits['screenshot-thumbnails']?.details?.items || []);
 
-    summary = {
-      id: testId,
-      url: lhr.finalUrl || url,
-      timestamp: lhr.fetchTime || new Date().toISOString(),
-      scores: {
-        performance: getScore('performance'),
-        accessibility: getScore('accessibility'),
-        bestPractices: getScore('best-practices'),
-        seo: getScore('seo'),
-      },
-      metrics: {
-        lcp: getMetric('largest-contentful-paint'),
-        cls: getMetric('cumulative-layout-shift'),
-        tbt: getMetric('total-blocking-time'),
-      },
-      userAgent: lhr.userAgent,
-      isMobile: isMobile,
-      filmstrip: filmstripData
-    };
+    // Update filmstrip in existing summary (preserves details and carbon)
+    summary.filmstrip = filmstripData;
     
     // Update summary file with new filmstrip
     jsonPath = path.join(reportDir, `${testId}.json`);