simplified code across the app and consolidated duplicated helpers

lib/view/pages/talk/widgets/chat_bubble_poll.dart

@@ -16,7 +16,7 @@ void showChatBubblePollSheet(
   required GetRoomResponseObject room,
   required int pollId,
   required String pollName,
-  required void Function({bool renew}) refetch,
+  required VoidCallback refetch,
 }) {
   showDetailsBottomSheet(
     context,
@@ -36,7 +36,7 @@ void showChatBubblePollSheet(
 class _PollSheetBody extends StatefulWidget {
   final GetRoomResponseObject room;
   final int pollId;
-  final void Function({bool renew}) refetch;
+  final VoidCallback refetch;
 
   const _PollSheetBody({
     required this.room,
@@ -49,21 +49,13 @@ class _PollSheetBody extends StatefulWidget {
 }
 
 class _PollSheetBodyState extends State<_PollSheetBody> {
-  Future<GetPollStateResponse>? _future;
+  late Future<GetPollStateResponse> _future = _fetch();
 
-  @override
-  void initState() {
-    super.initState();
-    _future = GetPollState(token: widget.room.token, pollId: widget.pollId).run();
-  }
+  Future<GetPollStateResponse> _fetch() =>
+      GetPollState(token: widget.room.token, pollId: widget.pollId).run();
 
   void _reload() {
-    setState(() {
-      _future = GetPollState(
-        token: widget.room.token,
-        pollId: widget.pollId,
-      ).run();
-    });
+    setState(() => _future = _fetch());
   }
 
   void _applyState(GetPollStateResponse state) {
@@ -71,7 +63,7 @@ class _PollSheetBodyState extends State<_PollSheetBody> {
       // Block body: an arrow would return the Future, which setState rejects.
       _future = Future.value(state);
     });
-    widget.refetch(renew: true);
+    widget.refetch();
   }
 
   @override