fix(Characters): 修复治疗逻辑并优化七魂武器计时

重构Rooster.gd中的治疗逻辑，现在会检查生命值和物品数量
调整SevenSoul武器的生成间隔从20000ms减少到19500ms
为SevenSoul子弹添加generationDuration变量统一计时逻辑
在子弹生成时添加治疗效果

scripts/Contents/Bullets/SevenSoul.gd

@@ -9,6 +9,7 @@ var colors = [
 	"#FDEB0F"
 ]
 var index = 0
+var generationDuration: float = 19500
 
 @onready var heart = $"%heart"
 @onready var effect: GPUParticles2D = $"%effect"
@@ -16,13 +17,14 @@ var index = 0
 func spawn():
 	modulate = Color(colors[index % colors.size()])
 	effect.emitting = true
+	launcher.tryHeal(5)
 	
 func ai():
-	rotation_degrees = 360.0 / colors.size() * index + timeLived() / 20000.0 * 360 - index / 6.0 * 360.0
+	rotation_degrees = 360.0 / colors.size() * index + timeLived() / generationDuration * 360 - index / 6.0 * 360.0
 	heart.global_rotation_degrees = 0
 	PresetBulletAI.lockLauncher(self, launcher, true)
 func applyDot():
-	if timeLived() > 20000 * ((6.0 - index) / 6.0):
+	if timeLived() > generationDuration * ((6.0 - index) / 6.0):
 		BulletBase.generate(ComponentManager.getBullet("SoulBall"), launcher, heart.global_position, heart.global_position.angle_to_point(get_global_mouse_position()))
 	await TickTool.millseconds(100)
 	return true

scripts/Contents/Characters/Rooster.gd

@@ -27,7 +27,11 @@ func ai():
 	if Input.is_action_just_pressed("sprint"):
 		trySprint()
 	if Input.is_action_just_pressed("heal"):
-		tryHeal(20)
+		if health < fields.get(FieldStore.Entity.MAX_HEALTH):
+			if useItem({
+				ItemStore.ItemType.APPLE: 1
+			}):
+				tryHeal(20)
 func sprint():
 	move(Vector2(
 		Input.get_axis("m_left", "m_right"),

scripts/Contents/Weapons/SevenSoul.gd

@@ -6,7 +6,7 @@ func attack(entity: EntityBase):
 	for i in 6:
 		for j in BulletBase.generate(ComponentManager.getBullet("SevenSoul"), entity, entity.texture.global_position, 0):
 			j.index = i
-		await TickTool.millseconds(20000 / 6.0)
+		await TickTool.millseconds(19500 / 6.0)
 func update(to, origin, _entity):
 	origin["atk"] += 1 * to * soulLevel
 	return origin