Feat: Add backend support for filmstrip capture

lib/runner.js

@@ -60,6 +60,7 @@ async function _executeTest(url, options) {
   const { v4: uuidv4 } = await import('uuid');
 
   const isMobile = options.isMobile ?? false; // Default to desktop (matches frontend)
+  const captureFilmstrip = options.captureFilmstrip ?? false;
   const reportDir = path.join(__dirname, '..', 'reports');
 
   // Ensure reports directory exists
@@ -111,7 +112,21 @@ async function _executeTest(url, options) {
       },
       throttlingMethod: 'provided'
     },
+    passes: [{
+      passName: 'defaultPass',
+      recordTrace: true, // Required for filmstrip
+      useThrottling: true,
+      pauseAfterFcpMs: 0,
+      pauseAfterLoadMs: 0,
+      networkQuietThresholdMs: 0,
+      cpuQuietThresholdMs: 0,
+      gatherers: []
+    }]
   };
+  
+  if (!captureFilmstrip) {
+     config.settings.skipAudits = ['screenshot-thumbnails', 'final-screenshot'];
+  }
 
   const runnerOptions = {
     logLevel: 'info',
@@ -148,7 +163,9 @@ async function _executeTest(url, options) {
         tbt: lhr.audits['total-blocking-time'].numericValue,
       },
       userAgent: lhr.userAgent,
-      isMobile: isMobile
+      isMobile: isMobile,
+      filmstrip: captureFilmstrip ? (lhr.audits['screenshot-thumbnails']?.details?.items || []) : []
+    };
     };
 
     // Save JSON Summary