fix: 修复组件销毁时事件解绑和空引用问题并添加任务界面

- 在多个组件的onDestroy方法中添加节点有效性检查，防止无效节点上解绑事件
- 修复MissionComp中任务启动逻辑，改为通过UI打开方式触发MissionStart事件
- 添加新的任务界面(UIID.Mission)及相关配置
- 修复MissionCardComp中Map未初始化导致的空引用问题
- 优化按钮事件绑定和解绑逻辑，增加空值检查

assets/script/game/skill/SkillView.ts

@@ -182,13 +182,13 @@ export class SkillView extends CCComp {
     /** 视图对象通过 ecs.Entity.remove(ModuleViewComp) 删除组件是触发组件处理自定义释放逻辑 */
     reset() {
         // 清理碰撞体事件监听
-        if (this.collider) {
+        if (this.collider && this.collider.isValid) {
             this.collider.off(Contact2DType.BEGIN_CONTACT, this.onBeginContact, this);
             this.collider.enabled = false;
         }
         this.pendingDisableCollider = false;
         this.isDisposing = false;
-        if (this.anim) {
+        if (this.anim && this.anim.isValid) {
             this.anim.off(Animation.EventType.FINISHED, this.onAnimationFinished, this);
         }
         // 取消所有定时器

assets/script/game/skill/oncend.ts

@@ -16,8 +16,9 @@ export class oneCom extends Component {
     }
 
     onDestroy() {
-        if (!this.anim) return;
-        this.anim.off(Animation.EventType.FINISHED, this.onAnimationFinished, this);
+        if (this.anim && this.anim.isValid) {
+            this.anim.off(Animation.EventType.FINISHED, this.onAnimationFinished, this);
+        }
         this.anim = null;
     }