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/Gameplay/Global/GameFlowManager.cs

@@ -23,7 +23,7 @@ namespace Script.Gameplay.Global
         private void Start()
         {
             _gameCountdownManager = GameCountdownManager.Instance;
-            _gameCountdownManager.StartLevelTimer();
+            GameManager.Instance.OnGameStart += OnGameStart;
             _gameCountdownManager.OnFinish.AddListener(() =>
                 {
                     if (IsOpenRestartGameOnCountdownFinish)
@@ -32,11 +32,16 @@ namespace Script.Gameplay.Global
             );
         }
 
+        public void OnGameStart()
+        {
+            _gameCountdownManager.StartLevelTimer();
+        }
+
         public IEnumerator OnCountDown()
         {
             StartCoroutine(ScreenGlitchManager.Instance.TriggerGlitchEffect());
             yield return new WaitForSeconds(1.0f);
-            GameManager.Instance.ReStartGameplay();
+            GameManager.Instance.StartGameplay();
         }
     }
 }