Treat email and news posts as distinct types on the frontend and backend

web/src/state.rs

@@ -362,6 +362,12 @@ pub fn update(msg: Msg, model: &mut Model, orders: &mut impl Orders<Msg>) {
                         open_messages,
                     };
                 }
+                graphql::show_thread_query::ShowThreadQueryThread::NewsPost(..) => {
+                    model.context = Context::ThreadResult {
+                        thread: data.thread,
+                        open_messages: HashSet::new(),
+                    };
+                }
             }
         }
         Msg::ShowThreadResult(bad) => {