fix: 列表缺乏childCount限制

lib/pages/search_panel/widgets/article_panel.dart

@@ -116,6 +116,7 @@ Widget searchArticlePanel(BuildContext context, ctr, list) {
               ),
             );
           },
+          childCount: list.length,
         ))
   ]);
 }

lib/pages/search_panel/widgets/user_panel.dart

@@ -76,6 +76,7 @@ Widget searchUserPanel(BuildContext context, ctr, list) {
               ),
             );
           },
+          childCount: list!.length,
         ))
   ]);
 }