Panel admin propio: gestión de noticias

- lib/admin.ts: isAdmin(session) por allowlist ADMIN_EMAILS (normalizada) o gmlevel
  de AzerothCore (account_access, resiliente si no existe). ADMIN_EMAILS/ADMIN_GMLEVEL
  en .env.local.
- lib/admin-news.ts: listNews / createNews / deleteNews (home_noticia).
- Routes /api/admin/news (POST, guard isAdmin) y /api/admin/news/[id] (DELETE).
- Páginas /admin (dashboard) y /admin/news (protegidas: no-admin -> redirect).
  AdminNewsManager (cliente: crear + listar + borrar).

Verificado: /admin sin permiso redirige, APIs 403; el pipeline crear noticia -> se
renderiza en la home (SSR) funciona. Turnstile bloquea el login por curl (correcto).
Pendiente admin: precios de servicios, foros, sitios de voto, usuarios.

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

web-next/messages/en.json

@@ -265,5 +265,22 @@
     "loginToPost": "Sign in to participate.",
     "emptyError": "Fill in all fields.",
     "genericError": "Something went wrong. Please try again later."
+  },
+  "Admin": {
+    "title": "Admin panel",
+    "dashboard": "Dashboard",
+    "news": "News",
+    "manageNews": "Manage news",
+    "newsTitle": "Title",
+    "newsContent": "Content (HTML)",
+    "newsLink": "Link (optional)",
+    "create": "Create news",
+    "creating": "Creating…",
+    "delete": "Delete",
+    "confirmDelete": "Delete this news item?",
+    "noNews": "No news.",
+    "forbidden": "You do not have permission to access here.",
+    "emptyError": "Fill in the title and content.",
+    "genericError": "Something went wrong."
   }
 }

web-next/messages/es.json

@@ -265,5 +265,22 @@
     "loginToPost": "Inicia sesión para participar.",
     "emptyError": "Completa todos los campos.",
     "genericError": "Algo ha salido mal. Inténtalo más tarde."
+  },
+  "Admin": {
+    "title": "Panel de administración",
+    "dashboard": "Panel",
+    "news": "Noticias",
+    "manageNews": "Gestionar noticias",
+    "newsTitle": "Título",
+    "newsContent": "Contenido (HTML)",
+    "newsLink": "Enlace (opcional)",
+    "create": "Crear noticia",
+    "creating": "Creando…",
+    "delete": "Borrar",
+    "confirmDelete": "¿Borrar esta noticia?",
+    "noNews": "No hay noticias.",
+    "forbidden": "No tienes permiso para acceder aquí.",
+    "emptyError": "Completa el título y el contenido.",
+    "genericError": "Algo ha salido mal."
   }
 }