feat(武器): 为弓武器添加生命汲取和升华选项

添加生命汲取效果，使箭矢命中时回复生命值
实现弓武器的升华系统，包含5种不同品质的强化选项
调整攻击逻辑以支持升华效果和生命值相关的伤害加成

scripts/Contents/Weapons/Bow.gd

@@ -1,6 +1,50 @@
 @tool
 extends Weapon
 
+func sublimateOptions() -> Array[SublimateOption]:
+	return [
+		SublimateOption.new(
+			"破风之翎",
+			"伤害+15%",
+			func(w: Weapon, _e):
+				w.addStoreExtra("atk", 0.15),
+			1,
+			CategoryStore.Quality.COMMON
+		),
+		SublimateOption.new(
+			"嗜血",
+			"伤害倍率+40%，但额外消耗1点生命值",
+			func(w: Weapon, _e):
+				w.addStoreExtra("atk", 0.4)
+				w.addStoreExtra("self", 1),
+			2,
+			CategoryStore.Quality.LEGENDARY
+		),
+		SublimateOption.new(
+			"风行者",
+			"鸡毛箭出手速度+5%",
+			func(w: Weapon, _e):
+				w.addStoreExtra("initSpeed", 0.05),
+			1,
+			CategoryStore.Quality.RARE
+		),
+		SublimateOption.new(
+			"破釜沉舟",
+			"每失去5%生命值，伤害+6%",
+			func(w: Weapon, _e):
+				w.addStoreExtra("missAtk", 0.06),
+			2,
+			CategoryStore.Quality.EPIC
+		),
+		SublimateOption.new(
+			"生命汲取",
+			"鸡毛箭命中时回复0.2点生命值",
+			func(w: Weapon, _e):
+				w.addStoreExtra("lifesteal", 0.2),
+			1,
+			CategoryStore.Quality.COMMON
+		),
+	]
 func update(to: int, origin: Dictionary, _entity: EntityBase):
 	origin["atk"] += 0.1 * to * soulLevel
 	origin["count"] = 1 * soulLevel
@@ -9,13 +53,15 @@ func update(to: int, origin: Dictionary, _entity: EntityBase):
 func attack(entity: EntityBase):
 	entity.takeDamage(readStore("self"))
 	var weaponPos = entity.findWeaponAnchor("normal")
-	for i in BulletBase.generate(
+	for bullet in BulletBase.generate(
 			ComponentManager.getBullet("Bow"),
 			entity,
 			weaponPos,
 			weaponPos.angle_to_point(get_global_mouse_position())
 		):
-			var bullet: Bow = i
-			bullet.count = readStore("count")
-			bullet.atk = readStore("atk")
+			if bullet is Bow:
+				bullet.count = readStore("count")
+				bullet.atk = readStore("atk") * (1 + (1 - entity.getHealthPercent()) * readStoreExtra("missAtk"))
+				bullet.speed *= 1 + readStoreExtra("initSpeed")
+				bullet.lifesteal = readStoreExtra("lifesteal")
 	return true