Fix measurement script HTML check and remove debug console.logs

- Update waitForFirstReactShellFetch to check for '<div id="root">' instead
  of '<div id="root"></div>' since the root div now contains splash screen
  content.
- Remove console.log timestamp instrumentation from index.html and main.tsx
  that was accidentally committed to production code.

Author: cursoragent

apps/web/index.html

@@ -8,9 +8,6 @@
     <meta name="theme-color" content="#161616" />
     <link rel="icon" href="/favicon.ico" sizes="48x48" />
     <link rel="apple-touch-icon" href="/apple-touch-icon.png" />
-    <script>
-      console.log("index.html loaded at", new Date().toISOString());
-    </script>
     <script>
       (() => {
         const LIGHT_BACKGROUND = "#ffffff";

apps/web/src/main.tsx

@@ -1,5 +1,3 @@
-console.log("main.tsx loaded at", new Date().toISOString());
-
 import React from "react";
 import ReactDOM from "react-dom/client";
 import { RouterProvider } from "@tanstack/react-router";
@@ -28,5 +26,3 @@ ReactDOM.createRoot(document.getElementById("root") as HTMLElement).render(
     <RouterProvider router={router} />
   </React.StrictMode>,
 );
-
-console.log("main.tsx rendered at", new Date().toISOString());

scripts/measure-react-startup.ts

@@ -159,7 +159,7 @@ async function waitForFirstReactShellFetch(
       const body = await response.text();
       if (
         response.ok &&
-        body.includes('<div id="root"></div>') &&
+        body.includes('<div id="root">') &&
         body.includes('<script type="module"')
       ) {
         return {