feat: 添加新武器彩虹旗和紫水晶簇，调整饲料属性和数值

refactor: 重构子弹生成逻辑，支持分裂和折射效果

fix: 修复掉落物拾取范围和碰撞检测问题

style: 优化UI显示，添加武器品质和类型标签

docs: 更新字段描述，调整部分饲料名称和分类

perf: 优化数学工具函数，添加随机数处理工具

test: 调整波次生成逻辑，添加新敌人类型

build: 添加新资源文件和相关导入配置

scripts/Structs/Feed.gd

@@ -7,6 +7,7 @@ signal selected(applied: bool)
 @export var avatarTexture: Texture2D = preload("res://icon.svg")
 @export var displayName: String = "未命名饲料"
 @export var quality: FeedName.Quality = FeedName.Quality.COMMON
+@export var topic: FeedName.Topic = FeedName.Topic.SURVIVAL
 @export var fields: Array[FieldStore.Entity] = []
 @export var fieldValues: Array[float] = []
 @export var costs: Array[ItemStore.ItemType] = []
@@ -60,6 +61,7 @@ func rebuildInfo():
 	avatarRect.texture = avatarTexture
 	nameLabel.displayName = displayName
 	nameLabel.quality = quality
+	nameLabel.topic = topic
 	for i in fieldsBox.get_children():
 		i.queue_free()
 	var noField = true