Servicios de personaje de pago (Stripe): patrón + rename

- lib/stripe.ts: createCheckoutSession (crea sesión Stripe + StripeLog en
  home_stripelog, success_url con {CHECKOUT_SESSION_ID}), isSessionPaid,
  claimPaidCheckout (verifica pagado + no entregado, marca fulfilled -> evita
  re-entregas; port de require_paid_stripe).
- lib/prices.ts: precios desde home_*price (rename/customize/race/faction/level).
- components/PaidServiceForm.tsx: selector + botón de pago -> redirige a la URL de
  Checkout de Stripe (session.url, sin stripe.js).
- Rename: route /api/character/rename/checkout (guard + valida personaje + crea
  checkout), página /rename (PaidServiceForm) y /rename/success (verifica pago y
  ejecuta SOAP .char rename, i18n). STRIPE_* + NEXT_PUBLIC_STRIPE_PUBLIC_KEY en
  .env.local. Namespace Rename.

Verificado: checkout sin sesión 401, /rename redirige a login, /rename/success con
session_id inválido no entrega el servicio (muestra error). Patrón para los demás
servicios de pago (cambiar precio + comando SOAP).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

web-next/app/api/character/rename/checkout/route.ts

@@ -0,0 +1,41 @@
+import { getSession } from '@/lib/session'
+import { getGameCharacters } from '@/lib/characters'
+import { getRenamePrice } from '@/lib/prices'
+import { createCheckoutSession } from '@/lib/stripe'
+
+export async function POST(request: Request) {
+  const session = await getSession()
+  if (!session.accountId) return Response.json({ success: false, error: 'notAuthenticated' }, { status: 401 })
+
+  let character = ''
+  try {
+    const body = await request.json()
+    character = String(body.character ?? '')
+  } catch {
+    return Response.json({ success: false, error: 'invalidRequest' }, { status: 400 })
+  }
+  if (!character) return Response.json({ success: false, error: 'invalidCharacter' })
+
+  const chars = await getGameCharacters(session.accountId)
+  if (!chars.find((c) => c.name === character)) {
+    return Response.json({ success: false, error: 'invalidCharacter' })
+  }
+
+  const price = await getRenamePrice()
+  const site = process.env.SITE_URL || ''
+  const ip = (request.headers.get('x-forwarded-for') || '').split(',')[0].trim() || '0.0.0.0'
+
+  const r = await createCheckoutSession({
+    accountId: session.accountId,
+    username: session.username || '',
+    email: session.bnetEmail || '',
+    acoreIp: ip,
+    amount: price,
+    characterName: character,
+    productName: `Renombrar personaje: ${character}`,
+    successUrl: `${site}/rename/success`,
+    cancelUrl: `${site}/rename`,
+  })
+  if (!r.success || !r.url) return Response.json({ success: false, error: 'stripeError' })
+  return Response.json({ success: true, url: r.url })
+}