fix: close unclosed isCreator conditional in ExpiryCountdownBanner

Missing closing div/paren left the JSX malformed, which was fatal enough
to abort tsc's semantic checking for the whole project before any other
file got analyzed. Discovered while typechecking after rebasing this
branch onto main.

Author: Austinaminu2

src/components/ExpiryCountdownBanner.tsx

@@ -180,7 +180,8 @@ export default function ExpiryCountdownBanner({
                 </button>
               </div>
             )}
-        </div>
+          </div>
+        )}
 
         <button
           onClick={() => setShow(false)}