fix(skill): 修复技能升级配置查找和友方技能目标选择逻辑

修复SkillUpList中默认配置键值错误，从6001改为1001
修复技能升级属性计算中的空值保护，避免undefined导致的NaN
重构友方技能目标选择逻辑，添加随机选取和按血量排序功能
调整辅助技能数值从基于最大生命值百分比改为基于攻击力百分比

assets/script/game/skill/Skill.ts

@@ -204,10 +204,10 @@ export class Skill extends ecs.Entity {
         sDataCom.group=caster.box_group
         sDataCom.casterEid=caster.ent.eid
         sDataCom.Attrs = {};
-        const SUp=SkillUpList[s_uuid]
-        const sCrt = (config.crt ?? 0)+(SUp.crt??0)*skill_lv;
-        const sFrz = (config.frz ?? 0)+(SUp.frz??0)*skill_lv;
-        const sBck = (config.bck ?? 0)+(SUp.bck??0)*skill_lv;
+        const SUp=SkillUpList[s_uuid]??SkillUpList[1001]
+        const sCrt = (config.crt ?? 0)+SUp.crt*skill_lv;
+        const sFrz = (config.frz ?? 0)+SUp.frz*skill_lv;
+        const sBck = (config.bck ?? 0)+SUp.bck*skill_lv;
         const sAp =config.ap+SUp.ap*skill_lv;
         const sHit=config.hit_count+SUp.hit_count*skill_lv + cAttrsComp.puncture
         sDataCom.Attrs[Attrs.ap] = cAttrsComp.ap*sAp;