test(lighthouse-react): Use static imports gated by MODE for tree-shaking

dev-packages/e2e-tests/test-applications/lighthouse-react/src/main.tsx

@@ -1,20 +1,24 @@
+import * as Sentry from '@sentry/react';
 import { createRoot } from 'react-dom/client';
 import App from './App';
 
-async function bootstrap() {
-  const mode = import.meta.env.MODE;
-  if (mode === 'init-only') {
-    const { initSentry } = await import('./sentry/init-only');
-    initSentry();
-  } else if (mode === 'tracing-replay') {
-    const { initSentry } = await import('./sentry/tracing-replay');
-    initSentry();
-  }
-  // 'no-sentry' mode: do not import any sentry module — the dynamic-import
-  // branches above are unreachable and Vite drops them from the bundle.
-
-  const root = createRoot(document.getElementById('root')!);
-  root.render(<App />);
+if (import.meta.env.MODE === 'tracing-replay') {
+  Sentry.init({
+    dsn: import.meta.env.VITE_E2E_TEST_DSN as string | undefined,
+    release: 'lighthouse-fixture',
+    environment: 'qa',
+    integrations: [Sentry.browserTracingIntegration(), Sentry.replayIntegration()],
+    tracesSampleRate: 1.0,
+    replaysSessionSampleRate: 1.0,
+    replaysOnErrorSampleRate: 1.0,
+  });
+} else if (import.meta.env.MODE === 'init-only') {
+  // enabled: false makes the SDK a guaranteed no-op (no transport allocation,
+  // no DSN warning). We're measuring pure SDK-loading + tree-shaking cost.
+  Sentry.init({ enabled: false });
 }
+// 'no-sentry' mode: both branches above are statically dead, so Vite drops
+// the @sentry/react import entirely from the bundle.
 
-void bootstrap();
+const root = createRoot(document.getElementById('root')!);
+root.render(<App />);