Can toggle dark theme

geneit_app/src/widgets/BaseAuthenticatedPage.tsx

@@ -14,6 +14,7 @@ import { AuthApi } from "../api/AuthApi";
 import { User, UserApi } from "../api/UserApi";
 import { AsyncWidget } from "./AsyncWidget";
 import { RouterLink } from "./RouterLink";
+import { DarkThemeButton } from "./DarkThemeButton";
 
 interface UserContext {
   user: User;
@@ -90,6 +91,8 @@ export function BaseAuthenticatedPage(): React.ReactElement {
                 </Typography>
 
                 <div>
+                  <DarkThemeButton />
+
                   <Button size="large" color="inherit">
                     {user!.name}
                   </Button>