feat: add src/main.tsx

src/main.tsx

@@ -0,0 +1,33 @@
+import React from 'react'
+import ReactDOM from 'react-dom/client'
+import { registerSW } from 'virtual:pwa-register'
+import { App } from './App'
+import './styles.css'
+
+async function bootstrap() {
+  registerSW({ immediate: true })
+
+  const session = await fetch('/api/session', { headers: { Accept: 'application/json' } })
+  if (session.status === 401) {
+    window.location.assign('/auth/login')
+    return
+  }
+  if (!session.ok) throw new Error(`Session check failed: ${session.status}`)
+
+  const payload = await session.json()
+  ReactDOM.createRoot(document.getElementById('root')!).render(
+    <React.StrictMode>
+      <App user={payload.user} />
+    </React.StrictMode>
+  )
+}
+
+bootstrap().catch(error => {
+  document.body.innerHTML = `
+    <main style="font-family:system-ui;padding:24px;max-width:720px;margin:auto">
+      <h1>Template Studio</h1>
+      <p>Unable to start the application.</p>
+      <pre style="white-space:pre-wrap">${String(error)}</pre>
+    </main>
+  `
+})