fix broken nagivation

Signed-off-by: William Casarin <jb55@jb55.com>

damus/Views/ChatroomView.swift

@@ -9,26 +9,39 @@ import SwiftUI
 
 struct ChatroomView: View {
     @EnvironmentObject var thread: ThreadModel
+    @Environment(\.dismiss) var dismiss
     
     var body: some View {
         ScrollViewReader { scroller in
             ScrollView {
-                VStack {
+                LazyVStack {
                     let count = thread.events.count
                     ForEach(Array(zip(thread.events, thread.events.indices)), id: \.0.id) { (ev, ind) in
                         ChatView(event: thread.events[ind],
                                  prev_ev: ind > 0 ? thread.events[ind-1] : nil,
                                  next_ev: ind == count-1 ? nil : thread.events[ind+1]
                         )
+                        .onTapGesture {
+                            if thread.event!.id == ev.id {
+                                //dismiss()
+                                toggle_thread_view()
+                            } else {
+                                thread.set_active_event(ev)
+                            }
+                        }
                         .environmentObject(thread)
                     }
                 }
             }
             .onAppear() {
-                scroll_to_event(scroller: scroller, id: thread.event.id, delay: 0.5, animate: true, anchor: .center)
+                scroll_to_event(scroller: scroller, id: thread.event!.id, delay: 0.3, animate: true, anchor: .bottom)
             }
         }
     }
+    
+    func toggle_thread_view() {
+        NotificationCenter.default.post(name: .toggle_thread_view, object: nil)
+    }
 }