bdf9cupe3: Add expert text search and category browse to the left column

src/components/App.tsx

@@ -7,6 +7,7 @@ import { SignInForm } from "./SignInForm";
 import { Logo } from "./Logo";
 import { Feed } from "./Feed";
 import { DiscoverRails } from "./DiscoverRails";
+import { ExpertSearch } from "./ExpertSearch";
 
 type State = { kind: "loading" } | { kind: "out" } | { kind: "in"; person: Person };
 
@@ -53,6 +54,7 @@ export function App() {
           <ul>
             <li><Link href="/" aria-current="page">Feed</Link></li>
           </ul>
+          <ExpertSearch />
         </nav>
         <div className="col-center">
           <Feed feedUserId={state.person.feedUserId} onSignedOut={() => setState({ kind: "out" })} />