fix(ecs): add entity field to COMPONENT_ADDED event (#396)

Fix missing entity field in COMPONENT_ADDED event payload that caused
ECSRoom's @NetworkEntity auto-broadcast to fail with 'Cannot read
properties of undefined'

.changeset/fix-component-added-entity.md

@@ -0,0 +1,7 @@
+---
+"@esengine/ecs-framework": patch
+---
+
+fix(ecs): COMPONENT_ADDED 事件添加 entity 字段
+
+修复 `ECSEventType.COMPONENT_ADDED` 事件缺少 `entity` 字段的问题，导致 ECSRoom 的 `@NetworkEntity` 自动广播功能报错。

packages/framework/core/src/ECS/Entity.ts

@@ -478,6 +478,7 @@ export class Entity {
             this.scene.eventSystem.emitSync(ECSEventType.COMPONENT_ADDED, {
                 timestamp: Date.now(),
                 source: 'Entity',
+                entity: this,
                 entityId: this.id,
                 entityName: this.name,
                 entityTag: this.tag?.toString(),