Adiciona menu 'Adicionar' configurável no menu da conta do usuário

Item pai 'Adicionar' no menu account com subitens derivados dinamicamente
a partir de site_users.settings:add_content_links. O pai fica oculto quando
o usuário não tem acesso a nenhum dos routes configurados.

- Rota site_users.add_content com _custom_access via AddContentAccessCheck
- hook_menu_links_discovered_alter() gera os subitens com IDs estáveis
- Formulário de settings com tabela editável (label, rota, parâmetro, peso)
- CSS do microsite atualizado com dropdown ao hover/focus-within

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/Plugin/Menu/AddContentMenuLink.php

@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Drupal\site_users\Plugin\Menu;
+
+use Drupal\Core\Menu\MenuLinkDefault;
+
+/**
+ * Provides derived menu links for add-content actions in the account menu.
+ *
+ * @MenuLink(
+ *   id = "site_users.add_content_child",
+ *   deriver = "Drupal\site_users\Plugin\Menu\AddContentMenuLinkDeriver"
+ * )
+ */
+class AddContentMenuLink extends MenuLinkDefault {
+}

src/Plugin/Menu/AddContentMenuLinkDeriver.php

@@ -0,0 +1,64 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Drupal\site_users\Plugin\Menu;
+
+use Drupal\Component\Plugin\Derivative\DeriverBase;
+use Drupal\Core\Config\ConfigFactoryInterface;
+use Drupal\Core\Plugin\Discovery\ContainerDeriverInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Generates account menu "Adicionar" child links from site_users.settings.
+ */
+class AddContentMenuLinkDeriver extends DeriverBase implements ContainerDeriverInterface {
+
+  public function __construct(
+    private readonly ConfigFactoryInterface $configFactory,
+  ) {}
+
+  public static function create(ContainerInterface $container, $base_plugin_id): static {
+    return new static($container->get('config.factory'));
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getDerivativeDefinitions($base_plugin_definition): array {
+    $this->derivatives = [];
+
+    $items = $this->configFactory
+      ->get('site_users.settings')
+      ->get('add_content_links') ?? [];
+
+    foreach ($items as $item) {
+      if (empty($item['route_name']) || empty($item['label'])) {
+        continue;
+      }
+
+      $id = $this->buildId($item);
+      $this->derivatives[$id] = $base_plugin_definition;
+      $this->derivatives[$id]['title'] = $item['label'];
+      $this->derivatives[$id]['route_name'] = $item['route_name'];
+      $this->derivatives[$id]['route_parameters'] = $item['route_parameters'] ?? [];
+      $this->derivatives[$id]['weight'] = (int) ($item['weight'] ?? 0);
+      $this->derivatives[$id]['menu_name'] = 'account';
+      $this->derivatives[$id]['parent'] = 'site_users.add_content';
+    }
+
+    return $this->derivatives;
+  }
+
+  /**
+   * Builds a stable derivative ID from the item's route and parameters.
+   */
+  private function buildId(array $item): string {
+    $parts = [preg_replace('/[^a-z0-9]/', '_', strtolower($item['route_name']))];
+    foreach ($item['route_parameters'] ?? [] as $value) {
+      $parts[] = preg_replace('/[^a-z0-9]/', '_', strtolower((string) $value));
+    }
+    return implode('_', $parts);
+  }
+
+}