Improve ACP forum management UI

api/migrations/Version20251224154500.php

@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+final class Version20251224154500 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return 'Add forum position for per-parent ordering.';
+    }
+
+    public function up(Schema $schema): void
+    {
+        $this->addSql('ALTER TABLE forum ADD position INT NOT NULL');
+        $this->addSql('UPDATE forum SET position = id');
+    }
+
+    public function down(Schema $schema): void
+    {
+        $this->addSql('ALTER TABLE forum DROP position');
+    }
+}