fix(SACastSystem): 修复技能目标选择逻辑并添加默认值

当sDamageTargets未找到目标时，回退到使用sDefaultTargets获取默认目标
同时为createSkill方法的isWFuny参数添加默认值false

assets/script/game/hero/SACastSystem.ts

@@ -193,7 +193,7 @@ export class SACastSystem extends ecs.ComblockSystem implements ecs.ISystemUpdat
     /**
      * 创建技能实体
      */
-    private createSkill(s_uuid: number, caster: HeroViewComp,targets:Vec3[]=[],isWFuny:boolean) {
+    private createSkill(s_uuid: number, caster: HeroViewComp,targets:Vec3[]=[],isWFuny:boolean=false) {
         // 检查节点有效性
         if (!caster.node || !caster.node.isValid) {
             console.warn("[SACastSystem] 施法者节点无效");
@@ -229,7 +229,10 @@ export class SACastSystem extends ecs.ComblockSystem implements ecs.ISystemUpdat
         // 简化版：选择最前方的敌人
         let heroAttrs = caster.ent.get(HeroAttrsComp);
         if (!heroAttrs) return [];
-        let targets=this.sDefaultTargets(caster,heroAttrs.fac)
+        let targets=this.sDamageTargets(caster, config, maxTargets);
+        if (targets.length === 0) {
+            targets.push(...this.sDefaultTargets(caster, heroAttrs.fac));
+        }
         return targets;
     }