- Introduced SharedMediaType::Poll and registered poll messages
as shared media in data_media_types.
- Added Data::PollMessagesViewer — a producer that loaded poll
message slices for a given history/topic/monoforum peer.
(data_poll_messages.cpp/h)
- Implemented Info::Polls::ListWidget and ListMemento — a new content
widget that rendered poll messages using HistoryView::ListWidget
with a custom chat theme, similar to existing shared media sections.
- Connected the new section into info_memento, info_controller,
info_media_buttons, and info_media_widget so it appeared as a button
in the Shared Media panel.