feat: 添加场景过渡类型支持，优化场景加载逻辑

Assets/_Game/Scripts/Core/DeathRespawnService.cs

@@ -56,6 +56,7 @@ namespace BaseGames.Core
             {
                 SceneName         = sm?.LastCheckpointScene,
                 EntryTransitionId = sm?.LastCheckpointSpawnId,
+                TransitionType    = TransitionType.Scene,
                 ShowLoadingScreen = true,
                 IsRespawn         = true,
             });

Assets/_Game/Scripts/Core/Events/SceneLoadRequest.cs

@@ -12,7 +12,10 @@ namespace BaseGames.Core.Events
         public string EntryId;
         /// <summary>玩家出生点 Transition ID（具体过渡门 ID，可为 null）</summary>
         public string EntryTransitionId;
-        /// <summary>是否显示加载画面</summary>
+        /// <summary>过渡类型，决定 <see cref="BaseGames.Core.SceneService"/> 的演出行为（淡出时长、加载画面等）。
+        /// 默认 <see cref="TransitionType.Room"/>，向后兼容旧请求。</summary>
+        public TransitionType TransitionType;
+        /// <summary>是否显示加载画面（由 TransitionType 自动推导，通常无需手动设置）。</summary>
         public bool ShowLoadingScreen;
         /// <summary>死亡复活时为 true，不执行正常过渡动画</summary>
         public bool IsRespawn;

Assets/_Game/Scripts/Core/Events/TransitionType.cs

@@ -0,0 +1,16 @@
+namespace BaseGames.Core.Events
+{
+    /// <summary>
+    /// 场景过渡类型，决定 <see cref="BaseGames.Core.SceneService"/> 的演出行为。
+    /// </summary>
+    public enum TransitionType
+    {
+        /// <summary>同区域相邻房间切换。极短淡出（≈0.05 s），无加载画面，相机硬切。
+        /// 适用于走廊边界、隐藏通道等玩家感知连续的场景边界。</summary>
+        Room,
+
+        /// <summary>跨大区域切换。完整淡出，显示加载画面。
+        /// 适用于地图间传送、返回标题、大区域入口等有明显空间跳跃感的切换。</summary>
+        Scene,
+    }
+}

Assets/_Game/Scripts/Core/Events/TransitionType.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 7a9a71d44467e124ea9e7cda40603f30
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/_Game/Scripts/Core/SceneService.cs

@@ -19,7 +19,11 @@ namespace BaseGames.Core
     }
 
     /// <summary>
-    /// 场景管理服务。
+    /// 场景管理服务。根据 <see cref="SceneLoadRequest.TransitionType"/> 执行不同演出：
+    /// <list type="bullet">
+    ///   <item><b>Room</b>：极短淡出（<see cref="_roomFadeDuration"/>），无加载画面。</item>
+    ///   <item><b>Scene</b>：完整淡出（<see cref="_sceneFadeDuration"/>），显示加载画面。</item>
+    /// </list>
     /// </summary>
     [DefaultExecutionOrder(-900)]
     public class SceneService : MonoBehaviour, ISceneService
@@ -32,7 +36,13 @@ namespace BaseGames.Core
         [SerializeField] private VoidEventChannelSO _onFadeOutRequest;
 
         [SerializeField] private SceneLoader _sceneLoader;
-        [SerializeField] private float _fadeDuration = 0.3f;
+
+        [Header("淡出时长")]
+        [Tooltip("Room 过渡：极短淡出，用于相邻房间边界切换（推荐 0.05 s）。")]
+        [SerializeField] private float _roomFadeDuration = 0.05f;
+
+        [Tooltip("Scene 过渡：完整淡出，用于大区域/地图间切换（推荐 0.4 s）。")]
+        [SerializeField] private float _sceneFadeDuration = 0.4f;
 
         private readonly CompositeDisposable _subscriptions = new();
 
@@ -48,8 +58,13 @@ namespace BaseGames.Core
 
         public IEnumerator LoadSceneCoroutine(SceneLoadRequest request)
         {
+            float fadeDuration = request.TransitionType == TransitionType.Scene
+                ? _sceneFadeDuration
+                : _roomFadeDuration;
+
             _onFadeOutRequest?.Raise();
-            yield return new WaitForSeconds(_fadeDuration);
+            if (fadeDuration > 0f)
+                yield return new WaitForSeconds(fadeDuration);
 
             if (_sceneLoader != null)
                 yield return StartCoroutine(_sceneLoader.LoadSceneCoroutine(request));
@@ -71,6 +86,7 @@ namespace BaseGames.Core
             {
                 SceneName         = AddressKeys.SceneMainMenu,
                 EntryTransitionId = null,
+                TransitionType    = TransitionType.Scene,
                 ShowLoadingScreen = false,
                 IsRespawn         = false
             });