Move activation drawable flow portion to ICarouselPanel

osu.Game/Screens/SelectV2/BeatmapCarousel.cs

@@ -124,15 +124,6 @@ namespace osu.Game.Screens.SelectV2
             }
         }
 
-        protected override void HandleItemActivated(CarouselItem item)
-        {
-            base.HandleItemActivated(item);
-
-            // TODO: maybe this should be handled by the panel itself?
-            if (GetMaterialisedDrawableForItem(item) is BeatmapCarouselPanel drawable)
-                drawable.FlashFromActivation();
-        }
-
         #endregion
 
         #region Filtering

osu.Game/Screens/SelectV2/BeatmapCarouselPanel.cs

@@ -123,7 +123,7 @@ namespace osu.Game.Screens.SelectV2
 
         public double DrawYPosition { get; set; }
 
-        public void FlashFromActivation()
+        public void Activated()
         {
             activationFlash.FadeOutFromOne(500, Easing.OutQuint);
         }

osu.Game/Screens/SelectV2/Carousel.cs

@@ -109,7 +109,10 @@ namespace osu.Game.Screens.SelectV2
             }
 
             if (currentSelection.CarouselItem != null)
+            {
+                (GetMaterialisedDrawableForItem(currentSelection.CarouselItem) as ICarouselPanel)?.Activated();
                 HandleItemActivated(currentSelection.CarouselItem);
+            }
         }
 
         #endregion

osu.Game/Screens/SelectV2/ICarouselPanel.cs

@@ -23,6 +23,11 @@ namespace osu.Game.Screens.SelectV2
         /// </summary>
         BindableBool KeyboardSelected { get; }
 
+        /// <summary>
+        /// Called when the panel is activated. Should be used to update the panel's visual state.
+        /// </summary>
+        void Activated();
+
         /// <summary>
         /// The Y position used internally for positioning in the carousel.
         /// </summary>