fix(scene-mgmt): 修复相机切换 blend 时间计算

Assets/Scripts/Framework/OtherKit/CameraKit.cs

@@ -156,6 +156,12 @@ namespace AibisDream.Framework
             {
                 yield return new WaitForSeconds(switchDuration);
             }
+            else
+            {
+                // 至少等待两帧，确保相机切换完成
+                yield return null;
+                yield return null;
+            }
         }
 
         private float SwitchCameraSync(CameraEnum camType, bool immediate = false)
@@ -181,6 +187,9 @@ namespace AibisDream.Framework
                     CinemachineBlendDefinition.Style.Cut, 0f);
             }
 
+            _virtualCameraDict.TryGetValue(_curCameraEnum, out var fromVCam);
+            var toVCam = _virtualCameraDict[camType];
+
             // 设置虚拟相机优先级
             foreach (var camPair in _virtualCameraDict)
             {
@@ -199,9 +208,34 @@ namespace AibisDream.Framework
                 return 0f;
             }
 
-            ActionKit.Delay(activeBrain.m_DefaultBlend.BlendTime, () => ResetVirCam(lastCamEnum)).StartGlobal();
+            // CinemachineBrain.LookupBlend 在 2.x 中是 private，这里重写其等价逻辑：
+            // Custom Blends 资产里有匹配项就用它，否则回退到 Default Blend。
+            var blendTime = ResolveBlendTime(activeBrain, fromVCam, toVCam);
+            ActionKit.Delay(blendTime, () => ResetVirCam(lastCamEnum)).StartGlobal();
 
-            return activeBrain.m_DefaultBlend.BlendTime;
+            return blendTime;
+        }
+
+        private static float ResolveBlendTime(
+            CinemachineBrain brain,
+            ICinemachineCamera fromCam,
+            ICinemachineCamera toCam)
+        {
+            var blend = brain.m_DefaultBlend;
+
+            if (brain.m_CustomBlends != null)
+            {
+                var fromName = fromCam != null ? fromCam.Name : string.Empty;
+                var toName = toCam != null ? toCam.Name : string.Empty;
+                blend = brain.m_CustomBlends.GetBlendForVirtualCameras(fromName, toName, blend);
+            }
+
+            if (CinemachineCore.GetBlendOverride != null)
+            {
+                blend = CinemachineCore.GetBlendOverride(fromCam, toCam, blend, brain);
+            }
+
+            return blend.BlendTime;
         }
 
         public void ResetCamera()

Assets/Scripts/SceneManagement/SceneCenter/SubwayCenter.cs

@@ -95,7 +95,7 @@ namespace AibisDream
 
         public IEnumerator Enter()
         {
-            yield return CameraKit.Instance.SwitchCamera(CameraEnum.Subway, true);
+            yield return CameraKit.Instance.SwitchCamera(CameraEnum.Subway);
             DialogUIManager.Instance.LoadBubbles(SubwayCenter.Instance.subwaySlots.CollectData());
         }
     }