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/package-lock.json

@@ -14,7 +14,8 @@
         "next-intl": "^4.13.2",
         "nodemailer": "^9.0.3",
         "react": "19.2.4",
-        "react-dom": "19.2.4"
+        "react-dom": "19.2.4",
+        "stripe": "^22.3.1"
       },
       "devDependencies": {
         "@tailwindcss/postcss": "^4.3.2",
@@ -7008,6 +7009,22 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/stripe": {
+      "version": "22.3.1",
+      "resolved": "https://registry.npmjs.org/stripe/-/stripe-22.3.1.tgz",
+      "integrity": "sha512-6XSLN0KK0IdfXqDHqMg6CDoO3eO62ye9dhzw0fZp55AUOzHR1YRJOqYHTsuCi4QJ4Ni/usEmXtq69c9ghKDmYw==",
+      "engines": {
+        "node": ">=18"
+      },
+      "peerDependencies": {
+        "@types/node": ">=18"
+      },
+      "peerDependenciesMeta": {
+        "@types/node": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/styled-jsx": {
       "version": "5.1.6",
       "resolved": "https://registry.npmjs.org/styled-jsx/-/styled-jsx-5.1.6.tgz",