feat: drawer.

client/src/components/Drawer/DrawerSuspense.js

@@ -1,6 +1,14 @@
 import React, { Suspense } from 'react';
-import { Spinner } from '@blueprintjs/core';
+import { Spinner, Classes } from '@blueprintjs/core';
+
+function LoadingContent() {
+  return (
+    <div className={Classes.DRAWER_BODY}>
+      <Spinner size={30} />
+    </div>
+  );
+}
 
 export default function DrawerSuspense({ children }) {
-  return <Suspense fallback={<Spinner size={30} />}>{children}</Suspense>;
+  return <Suspense fallback={<LoadingContent />}>{children}</Suspense>;
 }