feat(场景管理): 添加UIScene支持并重构场景管理器

refactor(渲染器): 优化相机切换时的渲染批处理

feat(调试工具): 新增游戏调试UI场景和九宫格面板组件

fix(动画系统): 跳过缺失的动画资源加载并记录日志

perf(资源加载): 使用BinaryFileStreamReader优化NPK文件解析

feat(地图系统): 支持多边形可行走区域调试显示

style(代码格式): 清理多余空格和统一文件编码

docs(注释): 补充关键类和方法的文档说明

test(启动跟踪): 添加启动过程性能跟踪工具

chore(依赖): 添加SDL2_ttf库支持

Game/include/ui/NineSliceActor.h

@@ -0,0 +1,54 @@
+#pragma once
+
+#include <array>
+#include <string>
+
+#include <frostbite2D/2d/actor.h>
+#include <frostbite2D/2d/sprite.h>
+
+namespace frostbite2D {
+
+/**
+ * @brief Composes 9 consecutive NPK frames into a resizable nine-slice panel.
+ */
+class NineSliceActor : public Actor {
+public:
+  NineSliceActor();
+  ~NineSliceActor() override = default;
+
+  static Ptr<NineSliceActor> createFromNpk(const std::string& imgPath,
+                                           size_t startIndex = 0);
+
+  bool SetSlices(const std::string& imgPath, size_t startIndex);
+  void SetSize(const Vec2& size);
+  void SetSize(float width, float height);
+
+  const std::string& GetImgPath() const { return imgPath_; }
+  size_t GetStartIndex() const { return startIndex_; }
+
+private:
+  enum SliceIndex : size_t {
+    TopLeft = 0,
+    Top = 1,
+    TopRight = 2,
+    Left = 3,
+    Center = 4,
+    Right = 5,
+    BottomLeft = 6,
+    Bottom = 7,
+    BottomRight = 8,
+    SliceCount = 9
+  };
+
+  void updateLayout();
+  void applySliceLayout(Ptr<Sprite> sprite, const Vec2& position,
+                        const Vec2& size);
+  Vec2 getNaturalSize() const;
+
+  std::string imgPath_;
+  size_t startIndex_ = 0;
+  std::array<Ptr<Sprite>, SliceCount> sliceSprites_;
+  std::array<Vec2, SliceCount> sliceNaturalSizes_ = {};
+};
+
+} // namespace frostbite2D