为随机角色卡补 hover 反向链路

新增 SelectRoleClearEventArgs：hover 随机卡时清空选中状态，让上方属性区回到 _randomRoleCard。

- SelectRoleForm.OnRandomHoverEnter 上报事件
- SelectRoleUseCase.ClearSelection 重置 SelectedRoleId 并重建 RawData
- SelectRoleController 订阅事件并刷新 Context
- SelectRoleForm.prefab 随机卡 _onPointerEnterAction 绑定新方法

Assets/GameMain/Scripts/Presentation/Menu/SelectRole/SelectRoleController.cs

@@ -23,6 +23,7 @@ namespace SepCore.UI
         {
             GameEntry.Event.Subscribe(SelectRoleReturnEventArgs.EventId, OnSelectRoleReturn);
             GameEntry.Event.Subscribe(SelectRoleHoverEventArgs.EventId, OnSelectRoleHover);
+            GameEntry.Event.Subscribe(SelectRoleClearEventArgs.EventId, OnSelectRoleClear);
             GameEntry.Event.Subscribe(SelectRoleConfirmEventArgs.EventId, OnSelectRoleConfirm);
         }
 
@@ -30,6 +31,7 @@ namespace SepCore.UI
         {
             GameEntry.Event.Unsubscribe(SelectRoleReturnEventArgs.EventId, OnSelectRoleReturn);
             GameEntry.Event.Unsubscribe(SelectRoleHoverEventArgs.EventId, OnSelectRoleHover);
+            GameEntry.Event.Unsubscribe(SelectRoleClearEventArgs.EventId, OnSelectRoleClear);
             GameEntry.Event.Unsubscribe(SelectRoleConfirmEventArgs.EventId, OnSelectRoleConfirm);
         }
 
@@ -170,6 +172,33 @@ namespace SepCore.UI
             await OpenUIAsync(rawData);
         }
 
+        private void OnSelectRoleClear(object sender, GameEventArgs e)
+        {
+            if (e is not SelectRoleClearEventArgs)
+            {
+                return;
+            }
+
+            if (!IsCurrentFormEventSender(sender))
+            {
+                return;
+            }
+
+            OnSelectRoleClearAsync().Forget();
+        }
+
+        private async UniTaskVoid OnSelectRoleClearAsync()
+        {
+            if (_useCase == null)
+            {
+                Log.Error("SelectRoleController.OnSelectRoleClearAsync() useCase is null.");
+                return;
+            }
+
+            SelectRoleRawData rawData = _useCase.ClearSelection();
+            await OpenUIAsync(rawData);
+        }
+
         private void OnSelectRoleConfirm(object sender, GameEventArgs e)
         {
             if (e is not SelectRoleConfirmEventArgs)