fix: 修复 Vector3d.Distance 调用并将 Spatial 文件添加到项目

- 修复 Distance 方法调用（使用实例方法而非静态方法）
- 将 SpatialHashGrid.cs 和 SpatialIndexManager.cs 添加到 csproj
- 在 PathAnimationManager.cs 中添加命名空间引用

NavisworksTransportPlugin.csproj

@@ -170,6 +170,10 @@
     
     <!-- Core - Collision Detection -->
     <Compile Include="src\Core\Collision\ClashDetectiveIntegration.cs" />
+
+    <!-- Core - Spatial Indexing -->
+    <Compile Include="src\Core\Spatial\SpatialHashGrid.cs" />
+    <Compile Include="src\Core\Spatial\SpatialIndexManager.cs" />
     
     <!-- Core - Properties Management -->
     <Compile Include="src\Core\Properties\AttributeGrouper.cs" />

src/Core/Animation/PathAnimationManager.cs

@@ -6,6 +6,7 @@ using System.Windows.Forms;
 using System.Windows.Threading;
 using Autodesk.Navisworks.Api;
 using Autodesk.Navisworks.Api.Clash;
+using NavisworksTransport.Core.Spatial;
 using NavisworksTransport.Utils;
 using NavisApplication = Autodesk.Navisworks.Api.Application;
 

src/Core/Spatial/SpatialHashGrid.cs

@@ -183,7 +183,7 @@ namespace NavisworksTransport.Core.Spatial
             return FindInRadius(center, radius, obj =>
             {
                 var objPos = getPositionFunc(obj);
-                return Vector3d.Distance(center, objPos);
+                return center.Distance(objPos);
             });
         }