feat(子弹): 新增狐狸爪子弹及其相关功能

添加FoxZhua子弹类型，包含追踪功能
修改FireScan子弹伤害计算方式为基于距离百分比
扩展BulletBase添加原始伤害和距离计算功能
更新Chick角色使用新子弹和调整攻击逻辑
调整Wave生成逻辑添加Boss检测功能
优化FirePot粒子效果和参数

scripts/Contents/Wave.gd

@@ -66,11 +66,19 @@ static func create(
 	wave.to = to_
 	wave.per = per_
 	return wave
+static func hasBoss() -> bool:
+	for wave in data:
+		if canSpawn(wave):
+			if wave.isBoss:
+				return true
+	return false
+static func canSpawn(wave: Wave) -> bool:
+	return wave.from <= current and wave.to >= current and int(current - wave.from) % wave.per == 0
 static func entityCountOf(wave: Wave) -> int:
-	if wave.from <= current and wave.to >= current and int(current - wave.from) % wave.per == 0:
+	if canSpawn(wave):
 		if wave.isBoss:
 			return 1
-		else:
+		elif !hasBoss():
 			return randi_range(ceil(wave.minCount), floor(wave.maxCount * (1 + GameRule.entityCountBoostPerWave * current)))
 	return 0
 static func spawn() -> Array: