feat(战斗系统): 添加KukeMC召唤机制及子实体管理

为KukeMC添加召唤子实体KukeChild的功能，并在血量低于25%时自动清除所有子实体并恢复血量
在EntityBase中添加tryKill方法统一处理实体销毁逻辑
在EntityTool中添加按类查找实体的工具方法

scripts/Contents/Characters/KukeChild.gd

@@ -1,4 +1,5 @@
 extends EntityBase
+class_name KukeChild
 
 var masterMine: KukeMC
 
@@ -12,11 +13,12 @@ func ai():
 	tryAttack(0)
 	tryAttack(1)
 	if timeLived() > 10000:
-		masterMine.tryHeal(100)
-		tryDie(null)
+		tryKill()
 func attack(type):
 	if type == 0:
 		BulletBase.generate(preload("res://components/Bullets/PurpleCrystalSmall.tscn"), self, findWeaponAnchor("normal"), position.angle_to_point(currentFocusedBoss.position))
 		await TickTool.millseconds(randi_range(5, 25))
 	elif type == 1:
 		BulletBase.generate(preload("res://components/Bullets/BossAttack/KukeMC/HeavyCrystal.tscn"), self, findWeaponAnchor("normal"), position.angle_to_point(currentFocusedBoss.position))
+func kill():
+	masterMine.tryHeal(100)

scripts/Contents/Characters/KukeMC.gd

@@ -1,6 +1,8 @@
 extends EntityBase
 class_name KukeMC
 
+var canSummon: bool = true
+
 func register():
 	fields[FieldStore.Entity.MAX_HEALTH] = 3000
 	fields[FieldStore.Entity.MOVEMENT_SPEED] = 0.5
@@ -9,6 +11,15 @@ func register():
 	attackCooldownMap[2] = 20000
 	attackCooldownMap[3] = 2000
 	inventory[ItemStore.ItemType.APPLE] = INF
+	healthChanged.connect(
+		func(h):
+			if h < fields[FieldStore.Entity.MAX_HEALTH] * 0.25:
+				canSummon = false
+				for child in EntityTool.findEntityByClass("KukeChild", get_tree()):
+					if child.masterMine == self:
+						child.tryKill()
+						tryHeal(200)
+	)
 func ai():
 	PresetEntityAI.follow(self, currentFocusedBoss, 500)
 	for bullet in get_tree().get_nodes_in_group("bullets"):
@@ -25,7 +36,7 @@ func attack(type):
 			fields[FieldStore.Entity.OFFSET_SHOOT] = 25
 			BulletBase.generate(preload("res://components/Bullets/PurpleCrystal.tscn"), self, findWeaponAnchor("normal"), position.angle_to_point(currentFocusedBoss.position))
 			await TickTool.millseconds(randi_range(10, 50))
-	elif type == 1 and health < fields[FieldStore.Entity.MAX_HEALTH] * 0.5:
+	elif type == 1 and health < fields[FieldStore.Entity.MAX_HEALTH] * 0.5 and canSummon:
 		for i in randi_range(1, 2):
 			var child = EntityBase.generate(preload("res://components/Characters/KukeChild.tscn"), position + MathTool.randv2_range(500))
 			child.currentFocusedBoss = currentFocusedBoss