feat(profiling): add react-scan via direct import for dev-only profiling

src/index.tsx

@@ -1,4 +1,5 @@
 import './polyfills.js';
+import './lib/react-scan';
 import React from 'react';
 import ReactDOM from 'react-dom/client';
 import App from './app';

src/lib/react-scan.ts

@@ -0,0 +1,10 @@
+if (import.meta.env.DEV) {
+  const { scan, getReport } = await import('react-scan');
+  scan({
+    enabled: true,
+    showToolbar: !(window as any).__PROFILING__,
+    playSound: !(window as any).__PROFILING__,
+    report: true,
+  });
+  (window as any).__getReactScanReport = getReport;
+}