fixed toolbar menu

resources/js/entry-topbar.jsx

@@ -0,0 +1,23 @@
+import React from 'react'
+import { createRoot } from 'react-dom/client'
+import Topbar from './components/Topbar'
+
+function mount() {
+  const container = document.getElementById('topbar-root')
+  if (!container) return
+
+  const root = createRoot(container)
+  root.render(<Topbar />)
+
+  // hide legacy header if present
+  const legacy = document.getElementById('legacy-topbar')
+  const topbar = document.getElementById('topbar')
+  if (legacy) legacy.style.display = 'none'
+  if (topbar) topbar.style.display = 'none'
+}
+
+if (document.readyState === 'loading') {
+  document.addEventListener('DOMContentLoaded', mount)
+} else {
+  mount()
+}