Feature/runtime cdn and plugin loader (#240)

* feat(ui): 完善 UI 布局系统和编辑器可视化工具

* refactor: 移除 ModuleRegistry，统一使用 PluginManager 插件系统

* fix: 修复 CodeQL 警告并提升测试覆盖率

* refactor: 分离运行时入口点，解决 runtime bundle 包含 React 的问题

* fix(ci): 添加 editor-core 和 editor-runtime 到 CI 依赖构建步骤

* docs: 完善 ServiceContainer 文档，新增 Symbol.for 模式和 @InjectProperty 说明

* fix(ci): 修复 type-check 失败问题

* fix(ci): 修复类型检查失败问题

* fix(ci): 修复类型检查失败问题

* fix(ci): behavior-tree 构建添加 @tauri-apps 外部依赖

* fix(ci): behavior-tree 添加 @tauri-apps/plugin-fs 类型依赖

* fix(ci): platform-web 添加缺失的 behavior-tree 依赖

* fix(lint): 移除正则表达式中不必要的转义字符

packages/core/src/ECS/Decorators/PropertyDecorator.ts

@@ -146,7 +146,9 @@ export type PropertyOptions =
     | AssetPropertyOptions
     | AnimationClipsPropertyOptions;
 
-export const PROPERTY_METADATA = Symbol('property:metadata');
+// 使用 Symbol.for 创建全局 Symbol，确保跨包共享元数据
+// Use Symbol.for to create a global Symbol to ensure metadata sharing across packages
+export const PROPERTY_METADATA = Symbol.for('@esengine/property:metadata');
 
 /**
  * 属性装饰器 - 声明组件属性的编辑器元数据

packages/core/src/ECS/Systems/EntitySystem.ts

@@ -284,6 +284,11 @@ export abstract class EntitySystem implements ISystemBase, IService {
         const querySystem = this.scene.querySystem;
         let currentEntities: readonly Entity[] = [];
 
+        // matchNothing 条件返回空数组（用于只需要生命周期方法的系统）
+        if (this._matcher.isNothing()) {
+            return [];
+        }
+
         // 空条件返回所有实体
         if (this._matcher.isEmpty()) {
             currentEntities = querySystem.getAllEntities();

packages/core/src/ECS/Utils/Matcher.ts

@@ -11,6 +11,7 @@ export interface QueryCondition {
     tag?: number;           // 按标签查询
     name?: string;          // 按名称查询
     component?: ComponentType; // 单组件查询
+    matchNothing?: boolean; // 不匹配任何实体
 }
 
 /**
@@ -107,6 +108,34 @@ export class Matcher {
         return new Matcher();
     }
 
+    /**
+     * 创建不匹配任何实体的匹配器
+     * 用于只需要 onBegin/onEnd 生命周期方法但不需要处理实体的系统
+     *
+     * @example
+     * ```typescript
+     * // 创建一个只在帧开始时执行的系统
+     * class FrameBeginSystem extends EntitySystem {
+     *     constructor() {
+     *         super(Matcher.nothing());
+     *     }
+     *
+     *     protected onBegin(): void {
+     *         // 每帧开始时执行
+     *     }
+     *
+     *     protected process(entities: readonly Entity[]): void {
+     *         // 永远不会被调用，因为没有实体匹配
+     *     }
+     * }
+     * ```
+     */
+    public static nothing(): Matcher {
+        const matcher = new Matcher();
+        matcher.condition.matchNothing = true;
+        return matcher;
+    }
+
     /**
      * 必须包含所有指定组件
      * @param types 组件类型
@@ -211,12 +240,14 @@ export class Matcher {
             none: [...this.condition.none],
             ...(this.condition.tag !== undefined && { tag: this.condition.tag }),
             ...(this.condition.name !== undefined && { name: this.condition.name }),
-            ...(this.condition.component !== undefined && { component: this.condition.component })
+            ...(this.condition.component !== undefined && { component: this.condition.component }),
+            ...(this.condition.matchNothing && { matchNothing: true })
         };
     }
 
     /**
      * 检查是否为空条件
+     * 注意：matchNothing 不算空条件，因为它是明确的"不匹配任何实体"语义
      */
     public isEmpty(): boolean {
         return this.condition.all.length === 0 &&
@@ -224,7 +255,15 @@ export class Matcher {
                this.condition.none.length === 0 &&
                this.condition.tag === undefined &&
                this.condition.name === undefined &&
-               this.condition.component === undefined;
+               this.condition.component === undefined &&
+               !this.condition.matchNothing;
+    }
+
+    /**
+     * 检查是否为"不匹配任何实体"的匹配器
+     */
+    public isNothing(): boolean {
+        return this.condition.matchNothing === true;
     }
 
     /**
@@ -237,6 +276,7 @@ export class Matcher {
         delete this.condition.tag;
         delete this.condition.name;
         delete this.condition.component;
+        delete this.condition.matchNothing;
         return this;
     }
 
@@ -257,6 +297,9 @@ export class Matcher {
         if (this.condition.component !== undefined) {
             cloned.condition.component = this.condition.component;
         }
+        if (this.condition.matchNothing) {
+            cloned.condition.matchNothing = true;
+        }
         return cloned;
     }
 
@@ -264,6 +307,10 @@ export class Matcher {
      * 字符串表示
      */
     public toString(): string {
+        if (this.condition.matchNothing) {
+            return 'Matcher[nothing]';
+        }
+
         const parts: string[] = [];
 
         if (this.condition.all.length > 0) {