fix(角色平衡): 调整牧羊犬格挡冷却时间和治疗量

将牧羊犬的格挡冷却时间从5秒减少到3秒
将HCN的治疗量从3点提升到5点
移除牧羊犬卡片的clickToRebuild属性

components/CharacterCards/MuyangDog.tscn

@@ -19,10 +19,9 @@ theme_override_styles/panel = SubResource("StyleBoxFlat_fi2nw")
 displayName = "牧羊犬"
 slogan = "以身挡险，恪守使命不离不弃"
 avatar = ExtResource("2_fi2nw")
-description = "每5秒发动格挡，弹反一切子弹。"
+description = "每3秒发动格挡，弹反一切子弹。"
 fields = Array[int]([0, 8, 3])
 fieldValues = Array[float]([50.0, 0.15, -0.2])
-clickToRebuild = true
 
 [node name="avatarTexture" parent="wrapper" parent_id_path=PackedInt32Array(2023039659) index="0" unique_id=1334645594]
 texture = ExtResource("2_fi2nw")
@@ -34,4 +33,4 @@ text = "牧羊犬"
 text = "“以身挡险，恪守使命不离不弃”"
 
 [node name="descriptionLabel" parent="wrapper/infoContainer" parent_id_path=PackedInt32Array(143242635) index="1" unique_id=808054282]
-text = "每5秒发动格挡，弹反一切子弹。"
+text = "每3秒发动格挡，弹反一切子弹。"

scripts/Contents/Characters/HCN.gd

@@ -1,4 +1,4 @@
 extends PlayerBase
 
 func summoned(entity: SummonBase):
-	entity.died.connect(func(): tryHeal(3))
+	entity.died.connect(func(): tryHeal(5))

scripts/Contents/Characters/MuyangDog.gd

@@ -1,6 +1,6 @@
 extends PlayerBase
 
-var parryCounter: CooldownTimer = CooldownTimer.new(5000)
+var parryCounter: CooldownTimer = CooldownTimer.new(3000)
 
 func ai():
 	super.ai()