avoid un-needed reloads for diffs

lib/controllers/event.dart

@@ -9,11 +9,12 @@ class EventController(final GetEventRequest request)
     extends AsyncNotifier<Event?> {
   @override
   Future<Event?> build() async {
-    final room = ref.watch(
-      RoomsController.provider.select((value) => value[request.roomId]),
-    );
-    final event = room?.events.values.firstWhereOrNull(
+    final event = ref.watch(
+      RoomsController.provider.select(
+        (rooms) => rooms[request.roomId]?.events.values.firstWhereOrNull(
           (event) => event.eventId == request.eventId,
+        ),
+      ),
     );
 
     if (event != null) return event;

lib/widgets/renderers/pinned_events_diff.dart

@@ -53,7 +53,8 @@ class const PinnedEventsDiff(
                 .new(roomId: roomId, eventId: change.$1),
               ),
             )) {
-              AsyncData(value: final event?) => InkWell(
+              // Keeps showing the event while it reloads
+              AsyncValue(value: final event?) => InkWell(
                 borderRadius: .circular(4),
                 hoverColor: color.withValues(alpha: 0.12),
                 onTap: jumpToEvent == null