fix: pass phase plan id and clear stale test skills on reuse

assets/script/game/map/MissionMonComp.ts

@@ -217,11 +217,10 @@ export class MissionMonCompComp extends CCComp {
         this.globalSpawnOrder = (this.globalSpawnOrder + 1) % 999;
 
         // 技能套装注入：通过 _testSkills 通道传递给 Mon.load()
-        if (monData.skills) {
-            (mon as any)._testSkills = monData.skills;
-        }
+        // Why 无条件赋值：实体池复用同一 JS 对象，条件赋值会让复用为小怪的实体残留上一个 Boss 的技能
+        (mon as any)._testSkills = monData.skills ?? undefined;
 
-        mon.load(spawnPos, scale, monData.uuid, monData.isBoss, landingY, monData.lv, posIndex);
+        mon.load(spawnPos, scale, monData.uuid, monData.isBoss, landingY, monData.lv, posIndex, monData.phase_plan_id ?? 0);
 
         // oops.message 全局事件总线：Boss 登场（震屏/音效由表现层消费）
         if (monData.isBoss) {