refactor: make match-collector export its types, and consume them in frontend

match_collector/src/item_tree.ts

@@ -6,31 +6,7 @@ import {
 } from './platform'
 
 import type { PlatformCounts } from './platform'
-
-type GoldAdvantageTag = 'ahead' | 'behind' | 'even'
-
-// Item tags that can be derived from purchase patterns
-type ItemTag = 'ahead' | 'behind' | 'region_euw' | 'region_eun' | 'region_na' | 'region_kr'
-
-type ItemTree = {
-  data: number | undefined
-  count: number
-  children: Array<ItemTree>
-
-  // Gold advantage tracking
-  boughtWhen: {
-    aheadCount: number
-    behindCount: number
-    evenCount: number
-    meanGold: number
-  }
-
-  // Platform tracking
-  platformCount: PlatformCounts
-
-  // Derived tags for display
-  tags: Array<ItemTag>
-}
+import type { GoldAdvantageTag, ItemTag, ItemTree } from './types'
 
 function treeInit(): ItemTree {
   return {
@@ -330,7 +306,6 @@ function treeDeriveTags(itemtree: ItemTree, expectedRegionDistribution?: Platfor
 }
 
 export {
-  ItemTree,
   PlatformCounts,
   GoldAdvantageTag,
   ItemTag,