Wrap App component with HashRouter for improved routing support

client/src/main.tsx

@@ -1,5 +1,6 @@
 import { StrictMode } from 'react';
 import { createRoot } from 'react-dom/client';
+import { HashRouter } from 'react-router-dom';
 import './index.css';
 import App from './App';
 import { initKeycloak } from './auth/keycloak';
@@ -9,7 +10,9 @@ async function bootstrap() {
 
   createRoot(document.getElementById('root')!).render(
     <StrictMode>
-      <App />
+      <HashRouter>
+        <App />
+      </HashRouter>
     </StrictMode>,
   );
 }