Fix sharing integration (#7198)

fix https://github.com/FreshRSS/FreshRSS/issues/7192

app/Controllers/configureController.php

@@ -179,10 +179,10 @@ class FreshRSS_configure_Controller extends FreshRSS_ActionController {
 			$share = $_POST['share'] ?? null;
 			if (is_array($share)) {
 				$share = array_filter($share, fn($value, $key): bool =>
-					is_string($key) && is_array($value) &&
+					is_int($key) && is_array($value) &&
 					is_array_values_string($value),
 					ARRAY_FILTER_USE_BOTH);
-				/** @var array<string,array<string,string>> $share */
+				/** @var array<int,array<string,string>> $share */
 				FreshRSS_Context::userConf()->sharing = $share;
 				FreshRSS_Context::userConf()->save();
 				invalidateHttpCache();

app/Models/UserConfiguration.php

@@ -52,7 +52,7 @@ declare(strict_types=1);
  * @property bool $show_nav_buttons
  * @property 'ASC'|'DESC' $sort_order
  * @property 'id'|'date'|'link'|'title'|'rand' $sort
- * @property array<string,array<string,string>> $sharing
+ * @property array<int,array<string,string>> $sharing
  * @property array<string,string> $shortcuts
  * @property bool $sides_close_article
  * @property bool $sticky_post