feat(战斗系统): 重构子弹追踪逻辑，使用实体当前焦点位置替代鼠标位置

修改所有子弹追踪逻辑，统一使用launcher.currentFocusedPosition作为目标位置
在EntityBase中新增currentFocusedPosition字段，用于存储当前焦点位置
调整MTY角色的攻击距离参数，使用常量定义最小招架和攻击距离

scripts/Contents/Bullets/AcidStorm.gd

@@ -38,7 +38,7 @@ func applyDot():
 				bullet.arg2 = clAtkSpeed
 			if bullet is AcidP:
 				bullet.arg1 = pOffset
-				bullet.arg2 = EntityTool.findClosetEntity(get_global_mouse_position(), get_tree(), !launcher.isPlayer(), launcher.isPlayer())
+				bullet.arg2 = EntityTool.findClosetEntity(launcher.currentFocusedPosition, get_tree(), !launcher.isPlayer(), launcher.isPlayer())
 			if bullet is AcidC:
 				bullet.arg1 = cAtk
 	await TickTool.millseconds(1000.0 / f)

scripts/Contents/Bullets/Arrow.gd

@@ -12,15 +12,15 @@ func register():
 	hitbox.disabled = true
 func ai():
 	if timeLived() < waitTime:
-		PresetBulletAI.lockLauncher(self, launcher, true)
-		rotation = position.angle_to_point(get_global_mouse_position()) + offsetRotation
+		PresetBulletAI.lockLauncher(self , launcher, true)
+		rotation = position.angle_to_point(launcher.currentFocusedPosition) + offsetRotation
 		return
 	else:
 		trail.emitting = true
 		hitbox.disabled = false
 	speed = (1 - lifeTimePercent()) * initialSpeed
 	baseDamage = speed * atk
-	PresetBulletAI.forward(self, rotation)
+	PresetBulletAI.forward(self , rotation)
 	if speed < 1:
 		tryDestroy()
 func succeedToHit(_dmg: float, _entity: EntityBase):

scripts/Contents/Bullets/BigLaser.gd

@@ -8,7 +8,7 @@ func spawn():
 	CameraManager.playAnimation("bigLaser")
 	baseDamage *= launcher.fields[FieldStore.Entity.ATTACK_SPEED]
 func ai():
-	rotation = lerp_angle(rotation, ((get_global_mouse_position() - position).angle()), 0.1)
+	rotation = lerp_angle(rotation, ((launcher.currentFocusedPosition - position).angle()), 0.1)
 	position = launcher.texture.global_position
 func applyDot():
 	hitbox.disabled = true

scripts/Contents/Bullets/Bow.gd

@@ -21,5 +21,5 @@ func spawn():
 	await TickTool.millseconds(waitTime)
 	tryDestroy()
 func ai():
-	PresetBulletAI.lockLauncher(self, launcher, true)
-	rotation = position.angle_to_point(get_global_mouse_position())
+	PresetBulletAI.lockLauncher(self , launcher, true)
+	rotation = position.angle_to_point(launcher.currentFocusedPosition)

scripts/Contents/Bullets/MagicMissle.gd

@@ -10,8 +10,8 @@ func ai():
 	if accelerating:
 		if roundBullets.count(self ) < 1:
 			accelerating = false
-		rotation = lerp_angle(rotation, position.angle_to_point(get_global_mouse_position()), 0.1)
-		speedV2 += (get_global_mouse_position() - position).normalized() * 1
+		rotation = lerp_angle(rotation, position.angle_to_point(launcher.currentFocusedPosition), 0.1)
+		speedV2 += (launcher.currentFocusedPosition - position).normalized() * 1
 	elif speed < 1 || baseDamage < 1:
 		tryDestroy()
 	speedV2 *= 0.995

scripts/Contents/Bullets/Volcano.gd

@@ -10,10 +10,10 @@ var dmg5: float = 0
 var splitAngle: float = 10
 
 func ai():
-	PresetBulletAI.lockLauncher(self, launcher, true)
+	PresetBulletAI.lockLauncher(self , launcher, true)
 	rotation = lerp_angle(
 		rotation,
-		position.angle_to_point(get_global_mouse_position()),
+		position.angle_to_point(launcher.currentFocusedPosition),
 		rotates
 	)
 func succeedToHit(_dmg: float, _entity: EntityBase):

scripts/Contents/Bullets/Wuwei.gd

@@ -6,7 +6,7 @@ class_name WuweiBullet
 func ai():
 	if canMove:
 		PresetBulletAI.lockLauncher(self , launcher, true)
-		PresetBulletAI.trace(self , get_global_mouse_position(), 0.1)
+		PresetBulletAI.trace(self , launcher.currentFocusedPosition, 0.1)
 
 func shoot():
 	for bullet in BulletBase.generate(