Method cleanup

packages/core/src/ECS/World.ts:501–509

* @zh 执行自动清理操作 * @en Execute auto cleanup operation

()

     * @en Execute auto cleanup operation
     */
    private cleanup(): void {
        const candidates = [...this._scenes.entries()]
            .filter(([name, scene]) => this._isSceneCleanupCandidate(name, scene));

        for (const [sceneName] of candidates) {
            this.removeScene(sceneName);
            logger.debug(`自动清理空Scene: ${sceneName} from World ${this.name}`);
        }
    }

    /**
     * 检查World是否激活