🐛 Poll bug fixes

lib/widgets/poll/poll_submit.dart

@@ -333,7 +333,8 @@ class _PollSubmitState extends ConsumerState<PollSubmit> {
     switch (q.type) {
       case SnPollQuestionType.rating:
         // rating: avg score (double or int)
-        final avg = (raw['rating'] as num).toDouble();
+        final avg = (raw['rating'] as num?)?.toDouble();
+        if (avg == null) break;
         final theme = Theme.of(context);
         body = Row(
           mainAxisAlignment: MainAxisAlignment.start,

lib/widgets/post/post_item.dart

@@ -571,7 +571,7 @@ class PostItem extends HookConsumerWidget {
                   onSubmit: (_) {},
                 ).padding(horizontal: 16, vertical: 12),
               ),
-              _ => const Placeholder(),
+              _ => Text('Unable show embed: ${embedData['type']}'),
             },
           )),
         if (isShowReference)