fix(技能): 修复治疗技能未正确触发目标生命值显示的问题

修改 HeroAttrsComp.add_hp 方法使其返回实际治疗值，并在 SCastSystem 中调用目标 health 方法更新显示

assets/script/game/hero/SCastSystem.ts

@@ -129,13 +129,14 @@ export class SCastSystem extends ecs.ComblockSystem implements ecs.ISystemUpdate
             const model = target.ent.get(HeroAttrsComp);
             if (!model || model.is_dead) continue;
             if (kind === SkillKind.Heal && config.ap !== 0) {
-                model.add_hp(config.ap, false);
+                let addHp = model.add_hp(config.ap, false);
+                target.health(addHp);
             } else if (kind === SkillKind.Shield && config.ap !== 0) {
                 model.add_shield(config.ap, false);
             }
         }
     }
-
+    //应用额外效果
     private applyExtraEffects(config: SkillConfig, targets: HeroViewComp[]) {
         for (const target of targets) {
             if (!target.ent) continue;