a bunch more usability improvements

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

damus/Views/ChatView.swift

@@ -148,7 +148,7 @@ struct ChatView: View {
         .contentShape(Rectangle())
         .id(event.id)
         .frame(minHeight: just_started ? PFP_SIZE : 0)
-        //.padding([.bottom], next_ev == nil ? 2 : 0)
+        .padding([.bottom], next_ev == nil ? 30 : 0)
         //.border(Color.green)
         
     }

damus/Views/ThreadView.swift

@@ -13,6 +13,7 @@ struct ThreadView: View {
     
     @EnvironmentObject var profiles: Profiles
     @EnvironmentObject var thread: ThreadModel
+    @Environment(\.dismiss) var dismiss
     
     var body: some View {
         Group {
@@ -35,6 +36,9 @@ struct ThreadView: View {
             }
              */
         }
+        .onReceive(NotificationCenter.default.publisher(for: .switched_timeline)) { n in
+            dismiss()
+        }
         .onReceive(NotificationCenter.default.publisher(for: .toggle_thread_view)) { _ in
             is_chatroom = !is_chatroom
             //print("is_chatroom: \(is_chatroom)")

damus/Views/TimelineView.swift

@@ -26,22 +26,30 @@ struct TimelineView: View {
     }
     
     var MainContent: some View {
-        ScrollView {
-            LazyVStack {
-                ForEach(events, id: \.id) { (ev: NostrEvent) in
-                    /*
-                    let evdet = EventDetailView(thread: ThreadModel(event: ev, pool: pool))
-                        .navigationBarTitle("Thread")
-                        .padding([.leading, .trailing], 6)
-                        .environmentObject(profiles)
-                     */
-                    
-                    EventView(event: ev, highlight: .none, has_action_bar: true)
-                        .onTapGesture {
-                            NotificationCenter.default.post(name: .open_thread, object: ev)
-                        }
+        ScrollViewReader { scroller in
+            ScrollView {
+                LazyVStack {
+                    ForEach(events, id: \.id) { (ev: NostrEvent) in
+                        /*
+                        let evdet = EventDetailView(thread: ThreadModel(event: ev, pool: pool))
+                            .navigationBarTitle("Thread")
+                            .padding([.leading, .trailing], 6)
+                            .environmentObject(profiles)
+                         */
+                        
+                        EventView(event: ev, highlight: .none, has_action_bar: true)
+                            .onTapGesture {
+                                NotificationCenter.default.post(name: .open_thread, object: ev)
+                            }
+                    }
                 }
             }
+            .onReceive(NotificationCenter.default.publisher(for: .scroll_to_top)) { _ in
+                guard let event = events.first else {
+                    return
+                }
+                scroll_to_event(scroller: scroller, id: event.id, delay: 0.0, animate: true)
+            }
         }
     }
 }