feat(asset): 统一资产引用使用 GUID 替代路径 (#287)

* feat(world-streaming): 添加世界流式加载系统

实现基于区块的世界流式加载系统，支持开放世界游戏：

运行时包 (@esengine/world-streaming):
- ChunkComponent: 区块实体组件，包含坐标、边界、状态
- StreamingAnchorComponent: 流式锚点组件（玩家/摄像机）
- ChunkLoaderComponent: 流式加载配置组件
- ChunkStreamingSystem: 区块加载/卸载调度系统
- ChunkCullingSystem: 区块可见性剔除系统
- ChunkManager: 区块生命周期管理服务
- SpatialHashGrid: 空间哈希网格
- ChunkSerializer: 区块序列化

编辑器包 (@esengine/world-streaming-editor):
- ChunkVisualizer: 区块可视化覆盖层
- ChunkLoaderInspectorProvider: 区块加载器检视器
- StreamingAnchorInspectorProvider: 流式锚点检视器
- WorldStreamingPlugin: 完整插件导出

* feat(asset): 统一资产引用使用 GUID 替代路径

将所有组件的资产引用字段从路径改为 GUID：
- SpriteComponent: texture -> textureGuid, material -> materialGuid
- SpriteAnimatorComponent: AnimationFrame.texture -> textureGuid
- UIRenderComponent: texture -> textureGuid
- UIButtonComponent: normalTexture -> normalTextureGuid 等
- AudioSourceComponent: clip -> clipGuid
- ParticleSystemComponent: 已使用 textureGuid

修复 AssetRegistryService 注册问题和路径规范化，
添加渲染系统的 GUID 解析支持。

* fix(sprite-editor): 更新 material 为 materialGuid

* fix(editor-app): 更新 AnimationFrame.texture 为 textureGuid

packages/editor-core/src/Services/AssetRegistryService.ts

@@ -139,9 +139,13 @@ class SimpleAssetDatabase {
     private readonly _typeToGuids = new Map<AssetRegistryType, Set<AssetGUID>>();
 
     addAsset(metadata: IAssetRegistryMetadata): void {
-        const { guid, path, type } = metadata;
-        this._metadata.set(guid, metadata);
-        this._pathToGuid.set(path, guid);
+        const { guid, type } = metadata;
+        // Normalize path separators for consistent storage
+        const normalizedPath = metadata.path.replace(/\\/g, '/');
+        const normalizedMetadata = { ...metadata, path: normalizedPath };
+
+        this._metadata.set(guid, normalizedMetadata);
+        this._pathToGuid.set(normalizedPath, guid);
 
         if (!this._typeToGuids.has(type)) {
             this._typeToGuids.set(type, new Set());
@@ -154,6 +158,7 @@ class SimpleAssetDatabase {
         if (!metadata) return;
 
         this._metadata.delete(guid);
+        // Path is already normalized when stored
         this._pathToGuid.delete(metadata.path);
 
         const typeSet = this._typeToGuids.get(metadata.type);
@@ -167,7 +172,9 @@ class SimpleAssetDatabase {
     }
 
     getMetadataByPath(path: string): IAssetRegistryMetadata | undefined {
-        const guid = this._pathToGuid.get(path);
+        // Normalize path separators for consistent lookup
+        const normalizedPath = path.replace(/\\/g, '/');
+        const guid = this._pathToGuid.get(normalizedPath);
         return guid ? this._metadata.get(guid) : undefined;
     }
 
@@ -638,6 +645,11 @@ export class AssetRegistryService {
      */
     getGuidByPath(relativePath: string): AssetGUID | undefined {
         const metadata = this._database.getMetadataByPath(relativePath);
+        if (!metadata) {
+            // Debug: show registered paths if not found
+            const stats = this._database.getStatistics();
+            logger.debug(`[AssetRegistry] GUID not found for path: "${relativePath}", total assets: ${stats.totalAssets}`);
+        }
         return metadata?.guid;
     }
 
@@ -776,4 +788,13 @@ export class AssetRegistryService {
     get projectPath(): string | null {
         return this._projectPath;
     }
+
+    /**
+     * Dispose the service
+     */
+    dispose(): void {
+        this._unsubscribeFromFileChanges();
+        this.unloadProject();
+        this._initialized = false;
+    }
 }