feat: Implement initial full-stack application structure including frontend pages, components, hooks, API integration, and backend services for account pooling and management.

frontend/src/main.tsx

@@ -0,0 +1,18 @@
+import { StrictMode } from 'react'
+import { createRoot } from 'react-dom/client'
+import { BrowserRouter } from 'react-router-dom'
+import { ToastProvider, ErrorBoundary } from './components/common'
+import './index.css'
+import App from './App'
+
+createRoot(document.getElementById('root')!).render(
+  <StrictMode>
+    <BrowserRouter>
+      <ErrorBoundary>
+        <ToastProvider>
+          <App />
+        </ToastProvider>
+      </ErrorBoundary>
+    </BrowserRouter>
+  </StrictMode>
+)