Foro: restaurar posts y temas borrados (moderadores)

- lib/forum.ts: getTopic/getPosts/countPosts aceptan includeDeleted (mods ven lo
  borrado); Post.deleted y TopicFull.deleted.
- API: PUT /api/forum/post restaura post (mod-only); moderate action 'restore'
  restaura tema (usa includeDeleted al leer el tema).
- UI: posts borrados atenuados con badge y botón Restaurar (PostActions);
  TopicModBar muestra banner + Restaurar tema cuando el tema está borrado.
- i18n es/en: Forum.restore, restoreTopic, deletedMark.

Verificado: build OK, PUT post y moderate restore 401 sin sesión, /forum 200.

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

web-next/components/TopicModBar.tsx

@@ -8,11 +8,13 @@ export function TopicModBar({
   topicId,
   locked,
   sticky,
+  deleted = false,
   moveForums = [],
 }: {
   topicId: number
   locked: boolean
   sticky: boolean
+  deleted?: boolean
   moveForums?: { id: number; name: string }[]
 }) {
   const t = useTranslations('Forum')
@@ -43,6 +45,22 @@ export function TopicModBar({
     }
   }
 
+  if (deleted) {
+    return (
+      <div className="mb-6 flex flex-wrap items-center gap-2 rounded-lg border border-red-900/60 bg-red-950/20 px-3 py-2 text-sm">
+        <span className="mr-1 font-semibold text-red-400">{t('deletedMark')}</span>
+        <button
+          type="button"
+          onClick={() => act('restore')}
+          disabled={busy}
+          className="text-xs text-green-400 hover:text-green-300 disabled:opacity-60"
+        >
+          {t('restoreTopic')}
+        </button>
+      </div>
+    )
+  }
+
   return (
     <div className="mb-6 flex flex-wrap items-center gap-2 rounded-lg border border-nw-border/60 bg-nw-panel-2/40 px-3 py-2 text-sm">
       <span className="mr-1 font-semibold text-nw-gold-light">{t('moderation')}:</span>