fix(): 修复重启后切换模式后相机丢失BUG，修复重启后UI绑定失效的BUG，将GameManager移动到Gameplay

Assets/Script/Core/GameManager.cs

@@ -1,20 +0,0 @@
-
-using System;
-
-namespace Core
-{
-    public class GameManager : MonoSingleton<GameManager>
-    {
-        public event Action OnGameStart;
-        private void Start()
-        {
-            ScenesManager.Instance.LoadMainMenu();
-        }
-
-        public void ReStartGameplay()
-        {
-            ScenesManager.Instance.LoadGameplay("Level1");
-            OnGameStart?.Invoke();
-        }
-    }
-}

Assets/Script/Core/GameManager.cs.meta

@@ -1,3 +0,0 @@
-fileFormatVersion: 2
-guid: db200c814b6e4465843d7ebc113fd9d0
-timeCreated: 1760362855

Assets/Script/Core/ScenesManager.cs

@@ -41,11 +41,17 @@ namespace Core
         public void LoadGameplay(string sceneName)
         {
             StartCoroutine(SwitchGameplay(sceneName));
-            if (!isLoadGameplayUI)
+            ReLoadUIScene();
+        }
+        
+        public void ReLoadUIScene()
+        {
+            if (isLoadGameplayUI)
             {
-                StartCoroutine(LoadSceneAdditive("UIScene"));
-                isLoadGameplayUI = true;
+                StartCoroutine(UnloadScene("UIScene"));
             }
+            StartCoroutine(LoadSceneAdditive("UIScene"));
+            isLoadGameplayUI = true;
         }
 
         private IEnumerator SwitchGameplay(string newScene)