fix: OnTreeViewSelected NRE + 日志清理

- _isInternalSelection 为 true 时 OnTreeViewSelected 直接 return，阻断 NW→树→NW 循环
- 调试日志降为 Debug 级别
- doc.CurrentSelection 加空检查

src/UI/WPF/Views/AliasTreeControl.xaml.cs

@@ -196,7 +196,10 @@ namespace NavisworksTransport.UI.WPF.Views
         /// </summary>
         private void OnTreeViewSelected(AliasNodeViewModel node)
         {
-            LogManager.Info($"[别名树] OnTreeViewSelected 进入: {node.OriginalName}");
+            // 由 NW 选择触发的 ExpandAndSelect 过程中的被动选中事件，不反向同步
+            if (_isInternalSelection) return;
+
+            LogManager.Debug($"[别名树] OnTreeViewSelected: {node.OriginalName}");
 
             _isInternalSelection = true;
             try
@@ -204,15 +207,17 @@ namespace NavisworksTransport.UI.WPF.Views
                 _currentSelectionItem = node.ModelItem;
                 TbCurrentNode.Text = $"当前: {node.OriginalName}";
                 var doc = NavisApplication.ActiveDocument;
-                if (doc != null && node.ModelItem != null)
+                if (doc != null && doc.CurrentSelection != null && node.ModelItem != null)
                 {
-                    LogManager.Info("[别名树] OnTreeViewSelected 设置NW选择");
                     var coll = new Autodesk.Navisworks.Api.ModelItemCollection { node.ModelItem };
                     try
                     {
                         doc.CurrentSelection.Clear();
                         doc.CurrentSelection.CopyFrom(coll);
-                        LogManager.Info("[别名树] OnTreeViewSelected 设置完成");
+                    }
+                    catch (NullReferenceException)
+                    {
+                        // NW API 内部 NRE（文档过渡状态），忽略
                     }
                     catch (Exception ex)
                     {
@@ -222,13 +227,12 @@ namespace NavisworksTransport.UI.WPF.Views
             }
             catch (Exception ex)
             {
-                LogManager.Error($"[别名树] 选中同步异常: {ex.Message} {ex.StackTrace}");
+                LogManager.Error($"[别名树] 选中同步异常: {ex.Message}");
             }
             finally
             {
                 _isInternalSelection = false;
             }
-            LogManager.Info("[别名树] OnTreeViewSelected 退出");
         }
 
         private void StartInlineEdit(AliasNodeViewModel node, TreeViewItem tvi)
@@ -255,14 +259,14 @@ namespace NavisworksTransport.UI.WPF.Views
                 var doc = NavisApplication.ActiveDocument;
                 if (doc == null) return;
 
-                var selected = doc.CurrentSelection.SelectedItems;
+                var selected = doc.CurrentSelection?.SelectedItems;
                 if (selected.Count == 1)
                 {
                     var item = selected.First();
                     _currentSelectionItem = item;
                     TbCurrentNode.Text = $"当前: {item.DisplayName}";
 
-                    LogManager.Info($"[别名树] NW选中: DisplayName={item.DisplayName}, ClassName={item.ClassName}");
+                    LogManager.Debug($"[别名树] NW选中: {item.DisplayName}");
 
                     ExpandAndSelect(item);
                 }
@@ -530,6 +534,20 @@ namespace NavisworksTransport.UI.WPF.Views
 
             LogManager.Info($"[别名树] ExpandAndSelect: target={item.DisplayName}");
 
+            // 整个 ExpandAndSelect 期间阻止树→NW 反向联动
+            _isInternalSelection = true;
+            try
+            {
+                ExpandAndSelectInternal(item);
+            }
+            finally
+            {
+                _isInternalSelection = false;
+            }
+        }
+
+        private void ExpandAndSelectInternal(Autodesk.Navisworks.Api.ModelItem item)
+        {
             // 0. 清理上次按需加载的无别名深层节点
             CleanupOnDemandNodes();
 
@@ -716,18 +734,15 @@ namespace NavisworksTransport.UI.WPF.Views
             {
                 try
                 {
-                    LogManager.Info($"[别名树] EnsureAliased: key={kvp.Key}, alias={kvp.Value}");
+                    LogManager.Debug($"[别名树] EnsureAliased: key={kvp.Key}, alias={kvp.Value}");
                     var item = FindModelItemByNodeKey(kvp.Key);
                     if (item == null)
                     {
-                        LogManager.Warning($"[别名树] EnsureAliased: FindModelItemByNodeKey 返回 null, key={kvp.Key}");
+                        LogManager.Debug($"[别名树] EnsureAliased: FindModelItemByNodeKey null, key={kvp.Key}");
                         continue;
                     }
-                    LogManager.Info($"[别名树] EnsureAliased: 找到 ModelItem DisplayName={item.DisplayName}, ClassName={item.ClassName}");
                     if (EnsurePathLoaded(item))
                         loaded++;
-                    else
-                        LogManager.Warning($"[别名树] EnsureAliased: EnsurePathLoaded 返回 false, item={item.DisplayName}");
                 }
                 catch (Exception ex)
                 {
@@ -754,12 +769,12 @@ namespace NavisworksTransport.UI.WPF.Views
             }
 
             var chainStr = string.Join(" -> ", chain.ConvertAll(c => c.DisplayName ?? "?"));
-            LogManager.Info($"[别名树] EnsurePathLoaded: chain=[{chainStr}], depth={chain.Count - 1}");
+            LogManager.Debug($"[别名树] EnsurePathLoaded: chain=[{chainStr}], depth={chain.Count - 1}");
 
             // 2. 匹配根节点
             var rootNodes = AliasTreeView.ItemsSource
                 as System.Collections.ObjectModel.ObservableCollection<AliasNodeViewModel>;
-            if (rootNodes == null) { LogManager.Warning("[别名树] EnsurePathLoaded: rootNodes null"); return false; }
+            if (rootNodes == null) return false;
 
             AliasNodeViewModel treeNode = null;
             foreach (var rn in rootNodes)
@@ -770,11 +785,7 @@ namespace NavisworksTransport.UI.WPF.Views
                     break;
                 }
             }
-            if (treeNode == null)
-            {
-                LogManager.Warning($"[别名树] EnsurePathLoaded: 根节点未匹配 chain[0]={chain[0].DisplayName}");
-                return false;
-            }
+            if (treeNode == null) return false;
             if (chain.Count == 1) return true;
 
             // 3. 逐层加载
@@ -783,14 +794,10 @@ namespace NavisworksTransport.UI.WPF.Views
             for (int i = 1; i < chain.Count; i++)
             {
                 var targetModelItem = chain[i];
-                LogManager.Info($"[别名树] EnsurePathLoaded: L{i} cur={treeNode.OriginalName} target={targetModelItem.DisplayName} childCnt={treeNode.Children.Count}");
                 ExpandTreeNode(treeNode);
 
                 if (treeNode.Children.Count == 1 && treeNode.Children[0].OriginalName == "加载中...")
-                {
-                    LogManager.Info($"[别名树] EnsurePathLoaded: L{i} 懒加载子节点");
                     LazyLoadChildren(treeNode, aliasMap, displayAlias);
-                }
 
                 AliasNodeViewModel child = null;
                 foreach (var c in treeNode.Children)
@@ -804,7 +811,6 @@ namespace NavisworksTransport.UI.WPF.Views
 
                 if (child == null)
                 {
-                    LogManager.Info($"[别名树] EnsurePathLoaded: L{i} 未匹配, BuildNode 创建");
                     child = BuildNode(targetModelItem, aliasMap, displayAlias,
                         treeNode.Depth + 1, treeNode.NodeKey, 0);
                     if (child != null)
@@ -816,7 +822,7 @@ namespace NavisworksTransport.UI.WPF.Views
 
                 if (child == null)
                 {
-                    LogManager.Warning($"[别名树] EnsurePathLoaded: L{i} child 为 null, 中断");
+                    LogManager.Debug($"[别名树] EnsurePathLoaded: child null at L{i}");
                     return false;
                 }
                 treeNode = child;