fix: re-enable Try the demo button

The demo button was hidden in #578 because the JWT token kept expiring
and required manual rotation. The token was subsequently updated with a
far-future expiry (year 2299) in commit da834ce, which removes the need
for manual rotation going forward.

The demo account is working and provides a useful way for contributors
without a comma device to explore and test the app locally.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: athospy

src/components/anonymous.jsx

@@ -163,8 +163,7 @@ class AnonymousLanding extends Component {
           </span>
 
           <a onClick={loginAsDemoUser}
-            className="flex items-center pl-4 pr-3 py-2 font-medium border border-white rounded-full hover:bg-[rgba(255,255,255,0.1)] active:bg-[rgba(255,255,255,0.2)] transition-colors"
-            style={{ height: 0, overflow: 'hidden', opacity: 0 }}
+            className="flex items-center pl-4 pr-3 py-2 font-medium border border-white rounded-full hover:bg-[rgba(255,255,255,0.1)] active:bg-[rgba(255,255,255,0.2)] transition-colors cursor-pointer"
           >
             Try the demo
             <RightArrow className="ml-1 h-4" />