Admin: gestión de precios de los servicios de personaje

- lib/admin-prices.ts: PRICE_TABLES (rename/customize/change-race/change-faction/
  level-up/transfer -> home_*price), getAllPrices, setPrice (fila única: DELETE+INSERT).
- Route /api/admin/prices (POST, guard isAdmin). Página /admin/prices con
  AdminPricesManager (editar cada precio). Enlace en el dashboard admin.
- Catálogo Admin (precios + nombres de servicio).

Verificado: /admin/prices redirige sin permiso, API 403; setPrice escribe en BD
correctamente (probado con env cargado). Pendiente admin: sitios de voto, gold options,
moderación del foro.

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

web-next/messages/en.json

@@ -281,6 +281,17 @@
     "noNews": "No news.",
     "forbidden": "You do not have permission to access here.",
     "emptyError": "Fill in the title and content.",
-    "genericError": "Something went wrong."
+    "genericError": "Something went wrong.",
+    "managePrices": "Manage prices",
+    "prices": "Service prices",
+    "price": "Price (€)",
+    "save": "Save",
+    "saved": "Saved",
+    "svc_rename": "Rename character",
+    "svc_customize": "Customize",
+    "svc_change-race": "Change race",
+    "svc_change-faction": "Change faction",
+    "svc_level-up": "Level up to 80",
+    "svc_transfer": "Transfer character"
   }
 }

web-next/messages/es.json

@@ -281,6 +281,17 @@
     "noNews": "No hay noticias.",
     "forbidden": "No tienes permiso para acceder aquí.",
     "emptyError": "Completa el título y el contenido.",
-    "genericError": "Algo ha salido mal."
+    "genericError": "Algo ha salido mal.",
+    "managePrices": "Gestionar precios",
+    "prices": "Precios de servicios",
+    "price": "Precio (€)",
+    "save": "Guardar",
+    "saved": "Guardado",
+    "svc_rename": "Renombrar personaje",
+    "svc_customize": "Personalizar",
+    "svc_change-race": "Cambiar raza",
+    "svc_change-faction": "Cambiar facción",
+    "svc_level-up": "Subir a nivel 80",
+    "svc_transfer": "Transferir personaje"
   }
 }