fix(ci): convert backstop config to cjs to support ESM project module resolution

backstop.config.cjs

@@ -0,0 +1,66 @@
+/* eslint-disable */
+module.exports = {
+  id: 'klz-cables',
+  viewports: [
+    {
+      label: 'phone',
+      width: 375,
+      height: 667,
+    },
+    {
+      label: 'tablet',
+      width: 768,
+      height: 1024,
+    },
+    {
+      label: 'desktop',
+      width: 1440,
+      height: 900,
+    },
+  ],
+  onBeforeScript: 'puppet/onBefore.js',
+  onReadyScript: 'puppet/onReady.js',
+  scenarios: [
+    {
+      label: 'Homepage',
+      url: `${process.env.TEST_URL || 'http://host.docker.internal:3000'}/`,
+      referenceUrl: '',
+      readyEvent: '',
+      readySelector: '',
+      delay: 500,
+      hideSelectors: [],
+      removeSelectors: [],
+      hoverSelector: '',
+      clickSelector: '',
+      postInteractionWait: 0,
+      selectors: [],
+      selectorExpansion: true,
+      expect: 0,
+      misMatchThreshold: 0.1,
+      requireSameDimensions: true,
+    },
+    {
+      label: '404 Error Page',
+      url: `${process.env.TEST_URL || 'http://host.docker.internal:3000'}/this-page-does-not-exist`,
+      delay: 500,
+      misMatchThreshold: 0.1,
+    },
+  ],
+  paths: {
+    bitmaps_reference: 'backstop_data/bitmaps_reference',
+    bitmaps_test: 'backstop_data/bitmaps_test',
+    engine_scripts: 'backstop_data/engine_scripts',
+    html_report: 'backstop_data/html_report',
+    ci_report: 'backstop_data/ci_report',
+  },
+  report: process.env.CI ? ['CI'] : ['browser'],
+  engine: 'puppeteer',
+  engineOptions: {
+    args: ['--no-sandbox', '--disable-setuid-sandbox'],
+    executablePath: process.env.CHROME_PATH || undefined, // Use explicit Chrome in CI
+  },
+  asyncCaptureLimit: 5,
+  asyncCompareLimit: 50,
+  debug: false,
+  debugWindow: false,
+};