update Weapon.series to use WeaponSeriesRef, remove unused type files

src/lib/types/Character.d.ts

@@ -1,43 +0,0 @@
-interface Character {
-  type: 'character'
-
-  id: string
-  granblue_id: string
-  character_id: readonly number[]
-  element: number
-  rarity: number
-  gender: number
-  max_level: number
-  season: number | null
-  season_name: string | null
-  series: number[]
-  series_names: string[]
-  gacha_available: boolean
-  name: {
-    [key: string]: string
-    en: string
-    ja: string
-  }
-  hp: {
-    min_hp: number
-    max_hp: number
-    max_hp_flb: number
-  }
-  atk: {
-    min_atk: number
-    max_atk: number
-    max_atk_flb: number
-  }
-  uncap: {
-    flb: boolean
-    ulb: boolean
-  }
-  race: {
-    race1: number
-    race2: number
-  }
-  proficiency: number[]
-  awakenings: Awakening[]
-  position?: number
-  special: boolean
-}

src/lib/types/Weapon.d.ts

@@ -1,40 +0,0 @@
-export interface Weapon {
-	type: 'weapon'
-
-	id: string
-	granblue_id: number
-	element: number
-	proficiency: number
-	max_level: number
-	max_skill_level: number
-	max_awakening_level: number
-	series: number
-	ax: boolean
-	ax_type: number
-	awakenings: Awakening[]
-	promotions: number[]
-	promotion_names: string[]
-	name: {
-		[key: string]: string
-		en: string
-		ja: string
-	}
-	hp: {
-		min_hp: number
-		max_hp: number
-		max_hp_flb: number
-		max_hp_ulb: number
-	}
-	atk: {
-		min_atk: number
-		max_atk: number
-		max_atk_flb: number
-		max_atk_ulb: number
-	}
-	uncap: {
-		flb: boolean
-		ulb: boolean
-		transcendence: boolean
-	}
-	position?: number
-}

src/lib/types/api/entities.ts

@@ -1,6 +1,8 @@
 // Core entity types based on Rails blueprints
 // These are the base types for game objects
 
+import type { WeaponSeriesRef } from './weaponSeries'
+
 export interface LocalizedName {
   en: string
   ja: string
@@ -17,7 +19,8 @@ export interface Weapon {
   maxLevel: number
   maxSkillLevel: number
   maxAwakeningLevel: number
-  series: number
+  /** Weapon series - object with slug/name/flags */
+  series: WeaponSeriesRef | null
   ax: boolean
   axType: number
   hp: {