Change featured hashtags to be displayed in navigation panel (#19382)

app/javascript/mastodon/components/navigation_portal.js

@@ -0,0 +1,30 @@
+import React from 'react';
+import { Switch, Route, withRouter } from 'react-router-dom';
+import { showTrends } from 'mastodon/initial_state';
+import Trends from 'mastodon/features/getting_started/containers/trends_container';
+import AccountNavigation from 'mastodon/features/account/navigation';
+
+const DefaultNavigation = () => (
+  <>
+    {showTrends && (
+      <>
+        <div className='flex-spacer' />
+        <Trends />
+      </>
+    )}
+  </>
+);
+
+export default @withRouter
+class NavigationPortal extends React.PureComponent {
+
+  render () {
+    return (
+      <Switch>
+        <Route path='/@:acct/(tagged/:tagged?)?' component={AccountNavigation} />
+        <Route component={DefaultNavigation} />
+      </Switch>
+    );
+  }
+
+}