refactor(武器系统): 重构火山武器和火扫弹攻击机制

移除火扫弹的独立脚本和火罐效果，改为直接在子弹中实现
火山武器改为三段伤害机制并调整基础伤害值
添加子弹基础伤害乘数数组支持多段伤害
更新相关场景和资源配置以匹配新机制

scripts/Contents/Bullets/FireScan.gd

@@ -1,6 +0,0 @@
-extends BulletBase
-class_name FireScan
-
-func ai():
-	PresetBulletAI.forward(self, rotation)
-	damage = (1 - lifeDistancePercent()) * originalDamage

scripts/Contents/Bullets/FireScan.gd.uid

@@ -1 +0,0 @@
-uid://dlg4g03ppdd2x

scripts/Contents/Bullets/FoxZhua.gd

@@ -5,4 +5,4 @@ class_name FoxZhua
 
 func ai():
 	if canTrace:
-		PresetBulletAI.lerpPosition(self, launcher.currentFocusedBoss.getTrackingAnchor() - Vector2(0, 200), speed)
+		PresetBulletAI.lerpPosition(self, launcher.currentFocusedBoss.getTrackingAnchor() - Vector2(0, 200), speed)

scripts/Contents/Characters/Chick.gd

@@ -1,8 +1,6 @@
 extends EntityBase
 class_name Chick
 
-@onready var firepot = $"%firepot"
-
 var played: bool = false
 
 func register():
@@ -43,10 +41,7 @@ func attack(type):
 			BulletBase.generate(ComponentManager.getBullet("ChickLaser"), self, texture.global_position, deg_to_rad(360.0 / laserCount * i))
 	elif type == 2:
 		var weaponPos = findWeaponAnchor("normal")
-		var target = weaponPos.angle_to_point(currentFocusedBoss.getTrackingAnchor())
-		firepot.global_rotation = target
-		firepot.shot()
-		BulletBase.generate(ComponentManager.getBullet("FireScan"), self, weaponPos, target)
+		BulletBase.generate(ComponentManager.getBullet("FireScan"), self, weaponPos, weaponPos.angle_to_point(currentFocusedBoss.getTrackingAnchor()))
 	elif type == 3:
 		BulletBase.generate(ComponentManager.getBullet("ChickSprint"), self, position, 0)
 		trySprint()

scripts/Contents/Weapons/Volcano.gd

@@ -2,7 +2,6 @@
 extends Weapon
 
 func update(to: int, origin: Dictionary, _entity: EntityBase):
-	origin["atk"] += 3 * to * soulLevel
 	origin["rotate"] += 0.015 * to * soulLevel
 	return origin
 func attack(entity: EntityBase):