fix: 统一子弹伤害属性设置并添加类型检查

修改多个武器和召唤物的攻击逻辑，将直接设置damage属性改为设置baseDamage属性
添加BulletBase类型检查确保安全访问子弹属性
移除Weapon.gd中冗余的鼠标事件连接

scripts/Contents/Bullets/ChainGun.gd

@@ -8,8 +8,9 @@ var splits: float = 10.0
 func spawn():
 	for j in count:
 		for i in BulletBase.generate(ComponentManager.getBullet("PurpleCrystalSmall"), launcher, anchor.global_position, rotation):
-			i.damage = baseDamage
-			var dir = Vector2.from_angle(i.rotation).rotated(deg_to_rad(-90))
-			i.global_position += dir * (count - j * 2) * splits / 2
+			if i is BulletBase:
+				var dir = Vector2.from_angle(i.rotation).rotated(deg_to_rad(-90))
+				i.baseDamage = baseDamage
+				i.position += dir * (count - j * 2) * splits / 2
 func ai():
 	PresetBulletAI.lockLauncher(self, launcher, true)