Seed all Pokemon species and add admin pagination

- Update fetch_pokeapi.py to import all 1025 Pokemon species instead of
  only those appearing in encounters
- Add paginated response for /pokemon endpoint with total count
- Add pagination controls to AdminPokemon page (First/Prev/Next/Last)
- Show current page and total count in admin UI
- Add bean for Pokemon forms support task
- Update UX improvements bean with route grouping polish item

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/src/components/admin/RouteEncounterFormModal.tsx

@@ -23,7 +23,8 @@ export function RouteEncounterFormModal({
   const [minLevel, setMinLevel] = useState(String(encounter?.minLevel ?? ''))
   const [maxLevel, setMaxLevel] = useState(String(encounter?.maxLevel ?? ''))
 
-  const { data: pokemonOptions = [] } = usePokemonList(search || undefined)
+  const { data } = usePokemonList(search || undefined)
+  const pokemonOptions = data?.items ?? []
 
   const handleSubmit = (e: FormEvent) => {
     e.preventDefault()