Foro: mover tema entre foros (moderadores)

- lib/forum-write.ts: moveTopic (forum_id + moved=1). lib/forum.ts: listForumsForMove.
- API /api/forum/moderate: acción 'move' con forumId, validando foro destino visible
  y distinto del actual.
- TopicModBar: selector «Mover a» con los foros visibles (excl. el actual); tras mover,
  redirige al foro destino.
- i18n es/en: Forum.moveTopic.

Verificado: build OK, move 401 sin sesión, /forum 200.

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

web-next/lib/forum-write.ts

@@ -71,6 +71,11 @@ export async function setTopicFlag(
   await db(DB.web).query(`UPDATE forum_topics SET ${field} = ? WHERE id = ?`, [value ? 1 : 0, topicId])
 }
 
+/** Mueve un tema a otro foro (marca moved=1). Solo moderación. */
+export async function moveTopic(topicId: number, newForumId: number): Promise<void> {
+  await db(DB.web).query('UPDATE forum_topics SET forum_id = ?, moved = 1 WHERE id = ?', [newForumId, topicId])
+}
+
 /** Comprueba que un foro existe y es visible (para crear tema). */
 export async function forumIsPostable(forumId: number): Promise<boolean> {
   const [rows] = await db(DB.web).query<RowDataPacket[]>(

web-next/lib/forum.ts

@@ -92,6 +92,18 @@ export async function getForumIndex(): Promise<Category[]> {
   }
 }
 
+/** Lista de foros visibles para el desplegable de «mover tema». */
+export async function listForumsForMove(): Promise<{ id: number; name: string }[]> {
+  try {
+    const [rows] = await db(DB.web).query<RowDataPacket[]>(
+      'SELECT id, name FROM forums WHERE visibility = 1 AND deleted = 0 ORDER BY `order`, id',
+    )
+    return rows.map((r) => ({ id: r.id, name: r.name }))
+  } catch {
+    return []
+  }
+}
+
 export async function getForum(id: number): Promise<{ name: string; description: string } | null> {
   try {
     const [rows] = await db(DB.web).query<RowDataPacket[]>(