feat: support concurrent Reddit accounts

apps/dashboard/src/components/account-owner-badge.tsx

@@ -0,0 +1,11 @@
+import type { RedditAccountOwner } from '../../../../packages/api-contracts/src/index.js';
+import { RedditUsernameLink } from './reddit-username-link.js';
+
+export function AccountOwnerBadge({ owner }: { owner?: RedditAccountOwner }) {
+  return (
+    <span className={owner ? 'account-owner-badge' : 'account-owner-badge is-unassigned'}>
+      <span aria-hidden="true">Account</span>
+      {owner ? <RedditUsernameLink username={owner.redditUsername} /> : <strong>Unassigned legacy content</strong>}
+    </span>
+  );
+}