feat(战斗): 优化自动施法目标选择逻辑

- 在 HeroAttrsComp 中新增 combat_target_eid 和 enemy_in_cast_range 字段，用于跟踪当前战斗目标
- 修改 MoveSystem 在移动时同步更新战斗目标状态，并清理无效目标
- 重构 SCastSystem 的自动施法逻辑，优先使用已锁定的战斗目标而非重新搜索
- 调整技能 6005 和 6006 的 hit_count 参数，分别改为 2 和 3 次打击
- 为友方技能施法添加事件派发机制，通知其他系统技能释放

assets/script/game/hero/MoveComp.ts

@@ -88,10 +88,12 @@ export class MoveSystem extends ecs.ComblockSystem implements ecs.ISystemUpdate
         if (model.fac !== FacSet.HERO && model.fac !== FacSet.MON) return;
         if (!move.moving) return;
         if (model.fac === FacSet.MON && smc.mission.stop_mon_action) {
+            this.clearCombatTarget(model);
             view.status_change("idle");
             return;
         }
         if (model.is_stop || model.is_dead || model.is_reviving || model.in_stun || model.in_frost) {
+            this.clearCombatTarget(model);
             if (!model.is_reviving) view.status_change("idle");
             return;
         }
@@ -103,13 +105,46 @@ export class MoveSystem extends ecs.ComblockSystem implements ecs.ISystemUpdate
         const nearestEnemy = this.findNearestEnemy(e);
         if (nearestEnemy) {
             this.processCombatLogic(e, move, view, model, nearestEnemy);
+            this.syncCombatTarget(model, view, nearestEnemy);
         } else {
+            this.clearCombatTarget(model);
             move.targetY = 0;
             this.processReturnFormation(e, move, view, model);
             model.is_atking = false;
         }
     }
 
+    private clearCombatTarget(model: HeroAttrsComp): void {
+        model.combat_target_eid = -1;
+        model.enemy_in_cast_range = false;
+    }
+
+    private syncCombatTarget(model: HeroAttrsComp, selfView: HeroViewComp, enemyView: HeroViewComp): void {
+        if (!enemyView || !enemyView.node || !enemyView.ent) {
+            this.clearCombatTarget(model);
+            return;
+        }
+        const enemyAttrs = enemyView.ent.get(HeroAttrsComp);
+        if (!enemyAttrs || enemyAttrs.is_dead || enemyAttrs.is_reviving || enemyAttrs.fac === model.fac) {
+            this.clearCombatTarget(model);
+            return;
+        }
+        model.combat_target_eid = enemyView.ent.eid;
+        model.enemy_in_cast_range = this.isEnemyInAttackRange(model, selfView.node.position.x, enemyView.node.position.x);
+    }
+
+    private isEnemyInAttackRange(model: HeroAttrsComp, selfX: number, enemyX: number): boolean {
+        const dist = Math.abs(selfX - enemyX);
+        const rangeType = model.type as HType.Melee | HType.Mid | HType.Long;
+        if (rangeType === HType.Melee) return dist <= this.meleeAttackRange;
+        if (rangeType === HType.Long) {
+            const [, maxRange] = this.resolveCombatRange(model, 360, 720);
+            return dist <= maxRange;
+        }
+        const [, maxRange] = this.resolveCombatRange(model, 120, 360);
+        return dist <= maxRange;
+    }
+
     private processCombatLogic(e: ecs.Entity, move: MoveComp, view: HeroViewComp, model: HeroAttrsComp, enemy: HeroViewComp) {
         const rangeType = model.type as HType.Melee | HType.Mid | HType.Long;
         switch (rangeType) {