chore: refactor mobile events (#24263)

chore: refactor mobile evets

mobile/lib/domain/models/events.model.dart

@@ -0,0 +1,32 @@
+import 'package:immich_mobile/domain/utils/event_stream.dart';
+
+// Timeline Events
+class TimelineReloadEvent extends Event {
+  const TimelineReloadEvent();
+}
+
+class ScrollToTopEvent extends Event {
+  const ScrollToTopEvent();
+}
+
+class ScrollToDateEvent extends Event {
+  final DateTime date;
+
+  const ScrollToDateEvent(this.date);
+}
+
+// Asset Viewer Events
+class ViewerOpenBottomSheetEvent extends Event {
+  final bool activitiesMode;
+  const ViewerOpenBottomSheetEvent({this.activitiesMode = false});
+}
+
+class ViewerReloadAssetEvent extends Event {
+  const ViewerReloadAssetEvent();
+}
+
+// Multi-Select Events
+class MultiSelectToggleEvent extends Event {
+  final bool isEnabled;
+  const MultiSelectToggleEvent(this.isEnabled);
+}