fix: fix typing errors

frontend/composables/useItemMap.ts

@@ -1,3 +1,5 @@
+import type { Item } from '~/types/cdragon'
+
 /**
  * Composable for fetching and managing item data from CDragon API
  * Returns a reactive Map of item ID to item data

frontend/composables/useRuneStyles.ts

@@ -1,3 +1,5 @@
+import type { Perk, PerkStyle } from '~/types/cdragon'
+
 /**
  * Composable for fetching and managing rune styles and keystones
  * Transforms rune data into format needed for display components

frontend/composables/useSummonerSpellMap.ts

@@ -1,3 +1,5 @@
+import type { SummonerSpell } from '~/types/cdragon'
+
 /**
  * Composable for fetching and managing summoner spell data from CDragon API
  * Returns a reactive Map of spell ID to spell data