perf: rewrite plebchan completely

src/index.tsx

@@ -0,0 +1,28 @@
+import React from 'react';
+import ReactDOM from 'react-dom/client';
+import App from './app';
+import { HashRouter as Router } from 'react-router-dom';
+import './index.css';
+import { App as CapacitorApp } from '@capacitor/app';
+import * as serviceWorkerRegistration from './service-worker-registration';
+
+const root = ReactDOM.createRoot(document.getElementById('root') as HTMLElement);
+root.render(
+  <React.StrictMode>
+    <Router>
+      <App />
+    </Router>
+  </React.StrictMode>,
+);
+
+// set up PWA https://cra.link/PWA
+serviceWorkerRegistration.register();
+
+// add back button in android app
+CapacitorApp.addListener('backButton', ({ canGoBack }) => {
+  if (canGoBack) {
+    window.history.back();
+  } else {
+    CapacitorApp.exitApp();
+  }
+});