feat: 添加小鸡角色显示名称，更新Boss状态条和伤害标签逻辑，增强EntityBase类的移动和攻击功能

scripts/Statemachine/DamageLabel.gd

@@ -3,10 +3,18 @@ class_name DamageLabel
 
 @export var damage: float = 0
 @export var crit: bool = false
+
+@onready var label: Label = $"%label"
+@onready var animator: AnimationPlayer = $"%animator"
+
 func _ready():
-	$"%label".text = str(round(damage)) + ("!!!" if crit else "")
-	$"%animator".play("show")
-	await $"%animator".animation_finished
+	if damage == 0:
+		label.text = "MISS"
+	else:
+		label.text = str(round(damage)) + ("!!!" if crit else "")
+	animator.play("show")
+	await animator.animation_finished
+	queue_free()
 
 static func create(spawnDamage: float, spawnCrit: bool, spawnPosition: Vector2, addToWorld: bool = true) -> DamageLabel:
 	var instance = preload("res://components/UI/DamageLabel.tscn").instantiate()