[questions][ui] fix no more questions overlap

apps/portal/src/pages/questions/browse.tsx

@@ -548,7 +548,9 @@ export default function QuestionsBrowsePage() {
                       );
                     }),
                 )}
-                <PaginationLoadMoreButton query={questionsInfiniteQuery} />
+                {questionCount !== 0 && (
+                  <PaginationLoadMoreButton query={questionsInfiniteQuery} />
+                )}
                 {questionCount === 0 && (
                   <div className="flex w-full items-center justify-center gap-2 rounded-md border border-slate-300 bg-slate-200 p-4 text-slate-600">
                     <NoSymbolIcon className="h-6 w-6" />