feat: 添加角色选择系统及相关功能

新增角色卡片组件和角色选择逻辑
实现角色卡片动画效果和交互功能
添加初始角色数据配置
修改启动面板以支持角色选择
更新主题样式和UI布局

scripts/Contents/Panels/Starter.gd

@@ -11,6 +11,8 @@ class_name StarterPanel
 @onready var crystalShow: ItemShow = $%crystal
 @onready var diamondShow: ItemShow = $%diamond
 
+@onready var charactersBox: Control = $%characters
+
 @onready var startSingleplayerBtn: Button = $%startSingleplayerBtn
 @onready var startMultiplayerBtn: Button = $%startMultiplayerBtn
 @onready var levelShow: Label = $%levelShow
@@ -27,9 +29,11 @@ class_name StarterPanel
 
 var historyStack
 
+static var GAMEMODE_MAP_WAVE = [Wave.WAVE_NORMAL, Wave.WAVE_BOSSRUSH, Wave.WAVE_MOWING]
+static var START_CHARACTERS = ["MuyangDog", "Lynx", "HCN"]
 static var buildingShader: bool = true
 static var selectingFeed: bool = true
-static var GAMEMODE_MAP_WAVE = [Wave.WAVE_NORMAL, Wave.WAVE_BOSSRUSH, Wave.WAVE_MOWING]
+static var selectedCharacter: String = START_CHARACTERS[1]
 
 @rpc("any_peer")
 func mutexPlayer(player: String):
@@ -159,6 +163,9 @@ func getPlayerNames() -> Array[String]:
 		result.append(i.text)
 	return result
 
+func getCurrentSelectedCharacter() -> CharacterCard:
+	return charactersBox.get_node(selectedCharacter as NodePath)
+
 func beforeOpen(_args: Array = []):
 	diffEdit.min_value = GameRule.difficultyRange.x
 	diffEdit.max_value = GameRule.difficultyRange.y
@@ -191,3 +198,15 @@ func rebuildInfo():
 				rebuildInfo()
 		)
 		upgradeFieldsBox.add_child(fieldShow)
+	for child in charactersBox.get_children():
+		charactersBox.remove_child(child)
+	for character in START_CHARACTERS:
+		var card = ComponentManager.getCharacterCard(character).instantiate() as CharacterCard
+		card.select.connect(
+			func():
+				if card.name == selectedCharacter: return
+				getCurrentSelectedCharacter().animator.play("hide")
+				selectedCharacter = card.name
+				getCurrentSelectedCharacter().animator.play("show")
+		)
+		charactersBox.add_child(card)