feat(UI): 添加初始增益选择面板功能

实现初始增益选择面板的创建和显示逻辑，包括：
- 新增SelectInitialFeed面板场景和脚本
- 修改CompilingTip面板结束后跳转到选择面板
- 在ComponentManager中添加面板管理功能
- 优化UIState的面板加载和切换逻辑

scripts/Contents/Panels/CompilingTip.gd

@@ -9,4 +9,5 @@ func afterOpen(_args: Array = []):
 			(effect.sounds.get_node("spawn") as AudioStreamPlayer2D).volume_db = - INF
 			effect.shot()
 		await TickTool.millseconds(3000)
-	UIState.closeCurrentPanel()
+	await TickTool.frame()
+	UIState.setPanel("SelectInitialFeed")

scripts/Contents/Panels/SelectIntialFeed.gd

@@ -0,0 +1,11 @@
+@tool
+extends FullscreenPanelBase
+
+@onready var initialFeedSelection: HBoxContainer = $%initialFeedSelection
+
+func beforeOpen(_args: Array = []):
+	for feed in initialFeedSelection.get_children():
+		feed.queue_free()
+	for feed in ComponentManager.feeds:
+		var card = feed.instantiate() as Feed
+		initialFeedSelection.add_child(card)

scripts/Contents/Panels/SelectIntialFeed.gd.uid

@@ -0,0 +1 @@
+uid://d02nijqx4oagh