Make events page remember scroll position when changing layouts.

lib/ui/screens/wonder_events/widgets/_events_list.dart

@@ -7,18 +7,23 @@ class _EventsList extends StatefulWidget {
     this.topHeight = 0,
     this.blurOnScroll = false,
     this.showTopGradient = true,
+    required this.initialScrollOffset,
+    required this.onScroll,
   }) : super(key: key);
   final WonderData data;
   final double topHeight;
   final bool blurOnScroll;
   final bool showTopGradient;
-
+  final double initialScrollOffset;
+  final void Function(double offset) onScroll;
   @override
   State<_EventsList> createState() => _EventsListState();
 }
 
 class _EventsListState extends State<_EventsList> {
-  final ScrollController _scroller = ScrollController();
+  late final ScrollController _scroller = ScrollController(initialScrollOffset: widget.initialScrollOffset)
+    ..addListener(() => widget.onScroll(_scroller.offset));
+
   @override
   void dispose() {
     _scroller.dispose();

lib/ui/screens/wonder_events/wonder_events.dart

@@ -24,6 +24,9 @@ class WonderEvents extends StatelessWidget {
   final WonderType type;
   late final _data = wondersLogic.getData(type);
 
+  double _scrollPos = 0;
+  void _handleScroll(double pos) => _scrollPos = pos;
+
   @override
   Widget build(BuildContext context) {
     void handleTimelineBtnPressed() => context.push(ScreenPaths.timeline(type));
@@ -102,6 +105,8 @@ class WonderEvents extends StatelessWidget {
               data: _data,
               topHeight: 100,
               blurOnScroll: false,
+              onScroll: _handleScroll,
+              initialScrollOffset: _scrollPos,
             ),
           ),
         ),
@@ -130,6 +135,8 @@ class WonderEvents extends StatelessWidget {
                     topHeight: topHeight,
                     blurOnScroll: true,
                     showTopGradient: false,
+                    onScroll: _handleScroll,
+                    initialScrollOffset: _scrollPos,
                   ),
                 ),
                 Gap($styles.insets.lg),