Add animation controller system, material assets and skeleton visualization

- .animctrl state machine asset (params/transitions/blend trees, 1D+2D
  directional blending) with Unity Animator-style editor panel: state
  list, transitions, params, directional pad preview driving live
  CrossFade on the selected entity
- Split animation evaluation out of SceneRenderer into
  AnimationSystem/AnimationEvaluator; skin palettes with rest-pose
  fallback and blend-weight epsilon filtering
- MaterialAsset (.material) with reload-safe preview tile pool
  (DropMaterial clears dirty refs before instance destruction)
- EditorGizmoPass skeleton wires + viewport joint overlay; camera
  projection rework (baked Vulkan Y-flip, ortho support)
- Editor/game build split via HELLOVULKAN_EDITOR option

App/editor/EditorContext.h

@@ -15,6 +15,12 @@
 #include <Engine/Renderer/EditorCamera.h>
 #include <Engine/Renderer/SceneTypes.h>   // kDisplayViewport / kDisplayDirect
 
+#include <entt/entt.hpp>
+
+class MaterialEditorPanel;   // 面板间联动通道（Details 双击槽位 / Content
+                             // Browser 双击 .material → 打开材质编辑器）
+class ControllerEditorPanel; // Details Controller 槽 Edit → 打开控制器编辑器
+
 // 沙盒特有状态（面板可选读取，空指针 = 该面板区块不显示）
 struct EditorContext {
     // 引擎门面
@@ -25,6 +31,12 @@ struct EditorContext {
     // 编辑器相机（Scene view 专用，归 Renderer 持有——与场景相机实体
     // 无关；面板经此做 F 焦点/Gizmo 视图/对齐跳转）
     Engine::EditorCamera *editorCamera = nullptr;
+    // 材质编辑器面板（Editor 持有；指派/编辑分离的联动入口）
+    MaterialEditorPanel *materialEditor = nullptr;
+    // 控制器编辑器面板（Editor 持有；指派/编辑分离的联动入口）
+    ControllerEditorPanel *controllerEditor = nullptr;
+    // 当前选中实体（Controller 编辑器 Preview 的驱动目标）
+    entt::entity *selected = nullptr;
 
     // PIE 运行态（Play-In-Editor）：Editor 持有，只读指针。
     // 面板门控用——运行态禁 Gizmo/编辑器热键，渲染源已是 primary 相机