feat(武器系统): 为BigLaser武器添加执行伤害和升华选项

- 在ObstacleBase和EntityBase中添加getHealthPercent方法用于获取生命值百分比
- 修改bulletHit方法支持伤害覆盖参数
- 为BigLaser武器添加5个升华选项，包括临界斩杀效果
- 实现damageOverride方法根据目标生命值动态调整伤害
- 修复store数值可能为负数的问题

scripts/Contents/Weapons/BigLaser.gd

@@ -2,6 +2,51 @@
 extends Weapon
 class_name BigLaserWeapon
 
+func sublimateOptions() -> Array[SublimateOption]:
+	return [
+		SublimateOption.new(
+			"湮灭强化",
+			"伤害+15",
+			func(w: Weapon, _e):
+				w.addStoreExtra("atk", 15),
+			1,
+			CategoryStore.Quality.COMMON
+		),
+		SublimateOption.new(
+			"高频激荡",
+			"间隔-0.01秒",
+			func(w: Weapon, _e):
+				w.addStoreExtra("time", -0.01),
+			1,
+			CategoryStore.Quality.RARE
+		),
+		SublimateOption.new(
+			"临界斩杀",
+			"对生命值低于30%的敌人，伤害+25%",
+			func(w: Weapon, _e):
+				w.addStoreExtra("executeAtk", 0.25),
+			1,
+			CategoryStore.Quality.EPIC
+		),
+		SublimateOption.new(
+			"蓄能聚焦",
+			"射线伤害+30，但伤害间隔+0.03秒",
+			func(w: Weapon, _e):
+				w.addStoreExtra("atk", 30)
+				w.addStoreExtra("time", 0.03),
+			1,
+			CategoryStore.Quality.LEGENDARY
+		),
+		SublimateOption.new(
+			"空间撕裂",
+			"射线持续时间+0.3秒",
+			func(w: Weapon, _e):
+				w.addStoreExtra("duration", 0.3),
+			2,
+			CategoryStore.Quality.COMMON
+		),
+	]
+
 func update(to: int, origin: Dictionary, _entity: EntityBase):
 	origin["atk"] += 5 * to * soulLevel
 	origin["time"] /= 1 + 0.05 * to * soulLevel
@@ -12,4 +57,7 @@ func attack(entity: EntityBase):
 		var bigLaser: BigLaser = bullet
 		bigLaser.dotTime = readStore("time") * 1000
 		bigLaser.baseDamage = readStore("atk")
+		bigLaser.executeAtk = readStoreExtra("executeAtk")
+		await TickTool.frame()
+		bigLaser.animator.speed_scale = 5 / (5 + readStoreExtra("duration"))
 	return true