feat(fairygui): FairyGUI 完整集成 (#314)

* feat(fairygui): FairyGUI ECS 集成核心架构

实现 FairyGUI 的 ECS 原生集成，完全替代旧 UI 系统：

核心类：
- GObject: UI 对象基类，支持变换、可见性、关联、齿轮
- GComponent: 容器组件，管理子对象和控制器
- GRoot: 根容器，管理焦点、弹窗、输入分发
- GGroup: 组容器，支持水平/垂直布局

抽象层：
- DisplayObject: 显示对象基类
- EventDispatcher: 事件分发
- Timer: 计时器
- Stage: 舞台，管理输入和缩放

布局系统：
- Relations: 约束关联管理
- RelationItem: 24 种关联类型

基础设施：
- Controller: 状态控制器
- Transition: 过渡动画
- ScrollPane: 滚动面板
- UIPackage: 包管理
- ByteBuffer: 二进制解析

* refactor(ui): 删除旧 UI 系统，使用 FairyGUI 替代

* feat(fairygui): 实现 UI 控件

- 添加显示类：Image、TextField、Graph
- 添加基础控件：GImage、GTextField、GGraph
- 添加交互控件：GButton、GProgressBar、GSlider
- 更新 IRenderCollector 支持 Graph 渲染
- 扩展 Controller 添加 selectedPageId
- 添加 STATE_CHANGED 事件类型

* feat(fairygui): 现代化架构重构

- 增强 EventDispatcher 支持类型安全、优先级和传播控制
- 添加 PropertyBinding 响应式属性绑定系统
- 添加 ServiceContainer 依赖注入容器
- 添加 UIConfig 全局配置系统
- 添加 UIObjectFactory 对象工厂
- 实现 RenderBridge 渲染桥接层
- 实现 Canvas2DBackend 作为默认渲染后端
- 扩展 IRenderCollector 支持更多图元类型

* feat(fairygui): 九宫格渲染和资源加载修复

- 修复 FGUIUpdateSystem 支持路径和 GUID 两种加载方式
- 修复 GTextInput 同时设置 _displayObject 和 _textField
- 实现九宫格渲染展开为 9 个子图元
- 添加 sourceWidth/sourceHeight 用于九宫格计算
- 添加 DOMTextRenderer 文本渲染层（临时方案）

* fix(fairygui): 修复 GGraph 颜色读取

* feat(fairygui): 虚拟节点 Inspector 和文本渲染支持

* fix(fairygui): 编辑器状态刷新和遗留引用修复

- 修复切换 FGUI 包后组件列表未刷新问题
- 修复切换组件后 viewport 未清理旧内容问题
- 修复虚拟节点在包加载后未刷新问题
- 重构为事件驱动架构，移除轮询机制
- 修复 @esengine/ui 遗留引用，统一使用 @esengine/fairygui

* fix: 移除 tsconfig 中的 @esengine/ui 引用

packages/sdk/module.json

@@ -20,7 +20,7 @@
     "@esengine/ecs-framework-math",
     "@esengine/engine-core",
     "@esengine/sprite",
-    "@esengine/ui",
+    "@esengine/fairygui",
     "@esengine/audio",
     "@esengine/camera",
     "@esengine/particle",

packages/sdk/package.json

@@ -26,7 +26,7 @@
         "@esengine/engine-core": "workspace:*",
         "@esengine/ecs-framework-math": "workspace:*",
         "@esengine/sprite": "workspace:*",
-        "@esengine/ui": "workspace:*",
+        "@esengine/fairygui": "workspace:*",
         "@esengine/audio": "workspace:*",
         "@esengine/camera": "workspace:*",
         "@esengine/particle": "workspace:*",

packages/sdk/src/index.ts

@@ -39,10 +39,123 @@ export * from '@esengine/engine-core';
 export * from '@esengine/sprite';
 
 // ============================================================================
-// UI System (@esengine/ui)
-// UI 系统
+// FairyGUI System (@esengine/fairygui)
+// FairyGUI 系统
+// Note: Selective exports to avoid conflicts with ecs-framework and math
 // ============================================================================
-export * from '@esengine/ui';
+export {
+    // ECS Integration
+    FGUIComponent,
+    FGUIRenderSystem,
+    getFGUIRenderSystem,
+    setFGUIRenderSystem,
+    FGUIRuntimeModule,
+    FGUIPlugin,
+    // Core
+    GObject,
+    GComponent,
+    GRoot,
+    GGroup,
+    Controller,
+    Transition,
+    UIConfig,
+    getUIConfig,
+    setUIConfig,
+    UIObjectFactory,
+    GObjectPool,
+    DragDropManager,
+    EScaleMode,
+    EAlignMode,
+    // Widgets
+    GImage,
+    GTextField,
+    GGraph,
+    GButton,
+    GProgressBar,
+    GSlider,
+    GLoader,
+    GList,
+    GTextInput,
+    EKeyboardType,
+    PopupMenu,
+    Window,
+    // Package
+    UIPackage,
+    PackageItem,
+    // Events
+    EventDispatcher,
+    FGUIEvents,
+    // Render
+    RenderCollector,
+    RenderBridge,
+    Canvas2DBackend,
+    FGUIRenderDataProvider,
+    createFGUIRenderDataProvider,
+    // Tween
+    GTween,
+    GTweener,
+    TweenManager,
+    TweenValue,
+    evaluateEase,
+    // Asset
+    FUIAssetLoader,
+    fuiAssetLoader,
+    // Field Types
+    EButtonMode,
+    EAutoSizeType,
+    EAlignType,
+    EVertAlignType,
+    ELoaderFillType,
+    EListLayoutType,
+    EListSelectionMode,
+    EOverflowType,
+    EPackageItemType,
+    EObjectType,
+    EProgressTitleType,
+    EScrollBarDisplayType,
+    EScrollType,
+    EFlipType,
+    EChildrenRenderOrder,
+    EGroupLayoutType,
+    EPopupDirection,
+    ERelationType,
+    EFillMethod,
+    EFillOrigin,
+    EObjectPropID,
+    EGearType,
+    EEaseType,
+    EBlendMode,
+    ETransitionActionType,
+    EGraphType,
+} from '@esengine/fairygui';
+
+// Re-export conflicting types with FGUI prefix
+export {
+    Timer as FGUITimer,
+    Stage as FGUIStage,
+    ServiceContainer as FGUIServiceContainer,
+    Point as FGUIPoint,
+    Rectangle as FGUIRectangle,
+} from '@esengine/fairygui';
+
+export type {
+    // FairyGUI types
+    IFGUIComponentData,
+    RenderSubmitCallback,
+    ItemRenderer,
+    ItemProvider,
+    IUISource,
+    TypedEventListener,
+    EventListener,
+    FGUIEventType,
+    IEventContext,
+    IInputEventData,
+    IFUIAsset,
+    IEngineRenderData,
+    IFGUIRenderDataProvider,
+    TextureResolverFn,
+    TweenCallback,
+} from '@esengine/fairygui';
 
 // ============================================================================
 // Audio System (@esengine/audio)

packages/sdk/tsconfig.json

@@ -12,7 +12,7 @@
         { "path": "../engine-core" },
         { "path": "../math" },
         { "path": "../sprite" },
-        { "path": "../ui" },
+        { "path": "../fairygui" },
         { "path": "../audio" },
         { "path": "../camera" },
         { "path": "../particle" },