feat(Debug): 添加FeedIsTypeTopic调试组件并更新蛋糕资源

添加用于调试的FeedIsTypeTopic场景和脚本，支持按主题筛选Feed
更新蛋糕资源的主题和字段配置

components/Debug/FeedIsTypeTopic.tscn

@@ -0,0 +1,8 @@
+[gd_scene load_steps=2 format=3 uid="uid://5fbadcha65g4"]
+
+[ext_resource type="Script" path="res://scripts/Debug/FeedIsTopic.gd" id="1_2hikw"]
+
+[node name="Debug" type="HBoxContainer"]
+theme_override_constants/separation = 0
+script = ExtResource("1_2hikw")
+targetTopics = Array[int]([6])

components/Feeds/Cake.tscn

@@ -7,9 +7,9 @@
 avatarTexture = ExtResource("2_ijk6h")
 displayName = "生日蛋糕"
 quality = 2
-topic = 4
-fields = Array[int]([4, 1])
-fieldValues = Array[float]([0.03, 0.04])
+topic = 6
+fields = Array[int]([16])
+fieldValues = Array[float]([1.0])
 costs = Array[int]([0, 1])
 costCounts = Array[int]([300, 200])