调整 UIRouter 的打开关闭 UI 的返回值，统一成 UniTask

Assets/GameMain/Scripts/Presentation/Main/DisplayItemInfo/DisplayItemInfoController.cs

@@ -46,7 +46,7 @@ namespace SepCore.UI
             return new DisplayItemInfoContext(rawData);
         }
 
-        public override async UniTask<int?> OpenUIAsync(object userData = null, float timeout = 30f)
+        public override async UniTask OpenUIAsync(object userData = null, float timeout = 30f)
         {
             if (userData is not DisplayItemInfoRawData rawData)
             {
@@ -59,18 +59,18 @@ namespace SepCore.UI
                     Log.Warning("DisplayItemInfoController.OpenUIAsync() rawData is required.");
                 }
 
-                return null;
+                return;
             }
 
             DisplayItemInfoContext context = BuildContext(rawData);
             if (context == null)
             {
                 Log.Warning("DisplayItemInfoController.OpenUIAsync() rawData is invalid.");
-                return null;
+                return;
             }
 
             _locked = false;
-            return await OpenFormAsync(context, timeout);
+            await OpenFormAsync(context, timeout);
         }
 
         public override async UniTask CloseUIAsync(object userData = null, float timeout = 30f)