重构UI架构：分离数据模型和显示逻辑

- 新增 Core 模块：GameObject、LogEntry、AssetItem 数据模型
- 新增 Managers 模块：SceneManager、LogSystem、ProjectManager
- Panel 层只负责显示，不再持有数据
- 解耦 HierarchyPanel 和 InspectorPanel 之间的直接依赖

ui/src/panels/InspectorPanel.h

@@ -1,7 +1,6 @@
 #pragma once
 
 #include "Panel.h"
-#include "HierarchyPanel.h"
 
 namespace UI {
 
@@ -9,17 +8,10 @@ class InspectorPanel : public Panel {
 public:
     InspectorPanel();
     void Render() override;
-    void SetHierarchyPanel(HierarchyPanel* panel) { m_hierarchyPanel = panel; }
 
 private:
-    void RenderTransformSection();
-    void RenderMeshRendererSection();
-    
-    HierarchyPanel* m_hierarchyPanel = nullptr;
-    
-    float m_position[3] = {0.0f, 1.0f, -10.0f};
-    float m_rotation[3] = {0.0f, 0.0f, 0.0f};
-    float m_scale[3] = {1.0f, 1.0f, 1.0f};
+    void RenderTransformSection(class TransformComponent* transform);
+    void RenderMeshRendererSection(class MeshRendererComponent* meshRenderer);
 };
 
 }