refactor(技能系统): 移除事件通信，直接调用方法添加技能

- 删除 HeroSkillsComp 中监听 GameEvent.UseSkillCard 的代码
- 在 MissionCardComp 中直接调用 HeroSkillsComp.addSkill() 方法
- 简化组件间通信方式，避免不必要的事件派发

assets/script/game/hero/HeroSkills.ts

@@ -45,20 +45,11 @@ export class HeroSkillsComp extends ecs.Comp {
     ai_timer: number = 0;
 
     onLoad() {
-        oops.message.on(GameEvent.UseSkillCard, this.onUseSkillCard, this);
+        
     }
 
     onDestroy() {
-        oops.message.off(GameEvent.UseSkillCard, this.onUseSkillCard, this);
-    }
-
-    private onUseSkillCard(event: string, args: any) {
-        const attrsComp = this.ent.get(HeroAttrsComp);
-        if (!attrsComp || !attrsComp.is_master) return;
-
-        const s_uuid = args as number;
-        console.log(`[HeroSkills] 收到技能选择事件，添加技能 ID: ${s_uuid}`);
-        this.addSkill(s_uuid, HSSet.skill);
+        
     }
 
     // ==================== 辅助方法 ====================
@@ -280,7 +271,6 @@ export class HeroSkillsComp extends ecs.Comp {
     }
     
     reset() {
-        oops.message.off(GameEvent.UseSkillCard, this.onUseSkillCard, this);
         this.skills = {};
     }
     setMaxAuto(on: boolean) {