refactor(UI): 优化字段显示逻辑并添加平滑相机移动

将字段显示和隐藏逻辑提取为独立方法
为相机添加位置平滑效果
在游戏重启时重置初始饲料选择状态

scripts/Statemachine/UIState.gd

@@ -48,19 +48,10 @@ func _physics_process(_delta):
 		if !fieldsAnimator.is_playing():
 			if showingFields:
 				if Input.is_action_just_released("showFields") || !(currentPanel is PausePanel):
-					showingFields = false
-					fieldsAnimator.play("hide")
+					hideFields()
 			else:
 				if Input.is_action_just_pressed("showFields") || currentPanel is PausePanel:
-					showingFields = true
-					for i in fields.get_children():
-						fields.remove_child(i)
-					for i in player.fields:
-						if player.fields[i] == EntityBase.TITLE_FLAG:
-							fields.add_child(QuickUI.graySmallText(i))
-						else:
-							fields.add_child(FieldShow.create(i, player.fields[i], false, player, true))
-					fieldsAnimator.play("show")
+					showFields()
 			
 		if Input.is_action_just_pressed("pause"):
 			if currentPanel:
@@ -100,6 +91,7 @@ static func setPanel(targetName: String = "", args: Array = []):
 				panel.hidePanel()
 static func closeCurrentPanel():
 	setPanel()
+
 static func showTip(text: String, messageType: TipBox.MessageType = TipBox.MessageType.INFO):
 	var box = TipBox.create(text, messageType)
 	tips.add_child(box)
@@ -110,3 +102,17 @@ static func clearTips():
 	for child in tips.get_children():
 		if child is TipBox:
 			child.destroy()
+
+static func showFields():
+	showingFields = true
+	for i in fields.get_children():
+		fields.remove_child(i)
+	for i in player.fields:
+		if player.fields[i] == EntityBase.TITLE_FLAG:
+			fields.add_child(QuickUI.graySmallText(i))
+		else:
+			fields.add_child(FieldShow.create(i, player.fields[i], false, player, true))
+	fieldsAnimator.play("show")
+static func hideFields():
+	showingFields = false
+	fieldsAnimator.play("hide")