Improve admin panel UX with toasts, evolution CRUD, sorting, drag-and-drop, and responsive layout

Add sonner toast notifications to all mutations, evolution management backend
(CRUD endpoints with search/pagination) and frontend (form modal with pokemon
selector, paginated list page), sortable AdminTable columns (Region/Gen/Year
on Games), drag-and-drop route reordering via @dnd-kit, skeleton loading states,
card-styled table wrappers, and responsive mobile nav in AdminLayout.

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

frontend/src/api/admin.ts

@@ -15,6 +15,10 @@ import type {
   PaginatedPokemon,
   CreateRouteEncounterInput,
   UpdateRouteEncounterInput,
+  EvolutionAdmin,
+  PaginatedEvolutions,
+  CreateEvolutionInput,
+  UpdateEvolutionInput,
 } from '../types'
 
 // Games
@@ -61,6 +65,24 @@ export const deletePokemon = (id: number) =>
 export const bulkImportPokemon = (items: Array<{ nationalDex: number; name: string; types: string[]; spriteUrl?: string | null }>) =>
   api.post<BulkImportResult>('/pokemon/bulk-import', items)
 
+// Evolutions
+export const listEvolutions = (search?: string, limit = 50, offset = 0) => {
+  const params = new URLSearchParams()
+  if (search) params.set('search', search)
+  params.set('limit', String(limit))
+  params.set('offset', String(offset))
+  return api.get<PaginatedEvolutions>(`/evolutions?${params}`)
+}
+
+export const createEvolution = (data: CreateEvolutionInput) =>
+  api.post<EvolutionAdmin>('/evolutions', data)
+
+export const updateEvolution = (id: number, data: UpdateEvolutionInput) =>
+  api.put<EvolutionAdmin>(`/evolutions/${id}`, data)
+
+export const deleteEvolution = (id: number) =>
+  api.del(`/evolutions/${id}`)
+
 // Route Encounters
 export const addRouteEncounter = (routeId: number, data: CreateRouteEncounterInput) =>
   api.post<RouteEncounterDetail>(`/routes/${routeId}/pokemon`, data)