Separate PokeAPI ID from national dex for correct form identification

Pokemon forms (e.g., Alolan Rattata) had their PokeAPI ID (10091) stored as
national_dex, causing them to display incorrectly. This renames the unique
identifier to pokeapi_id and adds a real national_dex field shared between
forms and their base species, so Alolan Rattata correctly shows as #19.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/types/admin.ts

@@ -32,6 +32,7 @@ export interface RouteReorderItem {
 }
 
 export interface CreatePokemonInput {
+  pokeapiId: number
   nationalDex: number
   name: string
   types: string[]
@@ -39,6 +40,7 @@ export interface CreatePokemonInput {
 }
 
 export interface UpdatePokemonInput {
+  pokeapiId?: number
   nationalDex?: number
   name?: string
   types?: string[]

frontend/src/types/game.ts

@@ -24,6 +24,7 @@ export interface RouteWithChildren extends Route {
 
 export interface Pokemon {
   id: number
+  pokeapiId: number
   nationalDex: number
   name: string
   types: string[]