refactor(UI): 移除界面单实例全局开关

移除 EnableUIFormSingleton 属性及字段，简化 UseSingletonOpenMode 逻辑为仅按类型判断。

Author: AlianBlank

Runtime/BaseUIManager.cs

@@ -204,22 +204,6 @@ public bool IsEnableUIShowAnimation
             set { m_IsEnableUIShowAnimation = value; }
         }
 
-        [UnityEngine.Scripting.Preserve]
-        private bool m_EnableUIFormSingleton = true;
-
-        /// <summary>
-        /// 获取或设置是否启用界面单实例打开模式。
-        /// </summary>
-        /// <remarks>
-        /// Gets or sets whether singleton mode is enabled when opening UI forms.
-        /// </remarks>
-        [UnityEngine.Scripting.Preserve]
-        public bool EnableUIFormSingleton
-        {
-            get { return m_EnableUIFormSingleton; }
-            set { m_EnableUIFormSingleton = value; }
-        }
-
         /// <summary>
         /// 是否对指定界面类型采用单实例打开模式。
         /// </summary>
@@ -231,7 +215,7 @@ public bool EnableUIFormSingleton
         [UnityEngine.Scripting.Preserve]
         protected bool UseSingletonOpenMode(Type uiFormType)
         {
-            if (!EnableUIFormSingleton || uiFormType == null)
+            if (uiFormType == null)
             {
                 return false;
             }

Runtime/UI/IUIManager.cs

@@ -85,14 +85,6 @@ public interface IUIManager
         /// </remarks>
         bool IsEnableUIHideAnimation { get; set; }
 
-        /// <summary>
-        /// 获取或设置是否启用界面单实例打开模式。
-        /// </summary>
-        /// <remarks>
-        /// Gets or sets whether singleton mode is enabled when opening UI forms.
-        /// </remarks>
-        bool EnableUIFormSingleton { get; set; }
-
         /// <summary>
         /// 获取或设置界面实例对象池对象过期秒数。
         /// </summary>

Runtime/UIComponent.cs

@@ -103,15 +103,6 @@ public partial class UIComponent : GameFrameworkComponent
         [UnityEngine.Scripting.Preserve]
         [SerializeField] private bool m_IsEnableUIHideAnimation = false;
 
-        /// <summary>
-        /// 是否启用界面单实例打开模式。
-        /// </summary>
-        /// <remarks>
-        /// Whether to enable singleton mode when opening UI forms.
-        /// </remarks>
-        [UnityEngine.Scripting.Preserve]
-        [SerializeField] private bool m_EnableUIFormSingleton = true;
-
         /// <summary>
         /// UI 自动回收间隔时间/秒。
         /// </summary>
@@ -295,26 +286,6 @@ public bool IsEnableUIHideAnimation
             get { return m_UIManager.IsEnableUIHideAnimation; }
         }
 
-        /// <summary>
-        /// 获取或设置是否启用界面单实例打开模式。
-        /// </summary>
-        /// <remarks>
-        /// Gets or sets whether singleton mode is enabled when opening UI forms.
-        /// </remarks>
-        [UnityEngine.Scripting.Preserve]
-        public bool EnableUIFormSingleton
-        {
-            get { return m_EnableUIFormSingleton; }
-            set
-            {
-                m_EnableUIFormSingleton = value;
-                if (m_UIManager != null)
-                {
-                    m_UIManager.EnableUIFormSingleton = value;
-                }
-            }
-        }
-
         /// <summary>
         /// 获取界面组数量。
         /// </summary>
@@ -510,7 +481,6 @@ private void Start()
             m_UIManager.RecycleInterval = m_RecycleInterval;
             m_UIManager.IsEnableUIHideAnimation = m_IsEnableUIHideAnimation;
             m_UIManager.IsEnableUIShowAnimation = m_IsEnableUIShowAnimation;
-            m_UIManager.EnableUIFormSingleton = m_EnableUIFormSingleton;
             // m_UIManager.InstancePriority = m_InstancePriority;
 
             m_CustomUIGroupHelper = Helper.CreateHelper(m_UIGroupHelperTypeName, m_CustomUIGroupHelper);