chore: Hide pinned events in thread

lib/pages/chat/chat_view.dart

@@ -191,10 +191,11 @@ class ChatView extends StatelessWidget {
             if (activeThreadId != null) {
               appbarBottomHeight += ChatAppBarListTile.fixedHeight;
             }
-            if (controller.room.pinnedEventIds.isNotEmpty) {
+            if (controller.room.pinnedEventIds.isNotEmpty &&
+                activeThreadId == null) {
               appbarBottomHeight += ChatAppBarListTile.fixedHeight;
             }
-            if (scrollUpBannerEventId != null) {
+            if (scrollUpBannerEventId != null && activeThreadId == null) {
               appbarBottomHeight += ChatAppBarListTile.fixedHeight;
             }
             return Scaffold(
@@ -269,7 +270,8 @@ class ChatView extends StatelessWidget {
                             ),
                           ),
                         ),
-                      if (scrollUpBannerEventId != null)
+                      if (scrollUpBannerEventId != null &&
+                          activeThreadId == null)
                         ChatAppBarListTile(
                           leading: IconButton(
                             color: theme.colorScheme.onSurfaceVariant,

lib/pages/chat/pinned_events.dart

@@ -59,7 +59,7 @@ class PinnedEvents extends StatelessWidget {
 
     final pinnedEventIds = controller.room.pinnedEventIds;
 
-    if (pinnedEventIds.isEmpty) {
+    if (pinnedEventIds.isEmpty || controller.activeThreadId != null) {
       return const SizedBox.shrink();
     }