Add pre-commit hooks for linting and formatting

Set up pre-commit framework with ruff (backend) and ESLint/Prettier/tsc
(frontend) hooks to catch issues locally before CI. Auto-format all
frontend files with Prettier to comply with the new check.

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

frontend/src/components/admin/EvolutionFormModal.tsx

@@ -1,7 +1,11 @@
 import { type FormEvent, useState } from 'react'
 import { FormModal } from './FormModal'
 import { PokemonSelector } from './PokemonSelector'
-import type { EvolutionAdmin, CreateEvolutionInput, UpdateEvolutionInput } from '../../types'
+import type {
+  EvolutionAdmin,
+  CreateEvolutionInput,
+  UpdateEvolutionInput,
+} from '../../types'
 
 interface EvolutionFormModalProps {
   evolution?: EvolutionAdmin
@@ -23,10 +27,10 @@ export function EvolutionFormModal({
   isDeleting,
 }: EvolutionFormModalProps) {
   const [fromPokemonId, setFromPokemonId] = useState<number | null>(
-    evolution?.fromPokemonId ?? null,
+    evolution?.fromPokemonId ?? null
   )
   const [toPokemonId, setToPokemonId] = useState<number | null>(
-    evolution?.toPokemonId ?? null,
+    evolution?.toPokemonId ?? null
   )
   const [trigger, setTrigger] = useState(evolution?.trigger ?? 'level-up')
   const [minLevel, setMinLevel] = useState(String(evolution?.minLevel ?? ''))