fix: use Joomla native CacheControllerFactory for cache clearing

Replace manual file deletion with Joomla's built-in cache API
(CacheControllerFactoryInterface::createCacheController->clean).
Same approach as com_cache uses. Cleans both site and admin cache.

Authored-by: Moko Consulting
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/packages/com_mokowaas/admin/src/Model/DashboardModel.php

@@ -267,44 +267,18 @@ class DashboardModel extends BaseDatabaseModel
 	{
 		try
 		{
-			// Purge all file-based cache directories
-			$root = JPATH_ROOT;
-			$dirs = [
-				$root . '/cache',
-				$root . '/administrator/cache',
+			// Use Joomla's native cache API — same as com_cache
+			$cache = Factory::getContainer()->get(\Joomla\CMS\Cache\CacheControllerFactoryInterface::class);
+			$cache->createCacheController('', ['defaultgroup' => ''])->cache->clean('');
+
+			// Also clean admin cache
+			$conf = Factory::getApplication()->get('cache_handler', 'file');
+			$options = [
+				'defaultgroup' => '',
+				'cachebase'    => JPATH_ADMINISTRATOR . '/cache',
+				'storage'      => $conf,
 			];
-
-			foreach ($dirs as $dir)
-			{
-				if (!is_dir($dir))
-				{
-					continue;
-				}
-
-				$it = new \RecursiveIteratorIterator(
-					new \RecursiveDirectoryIterator($dir, \RecursiveDirectoryIterator::SKIP_DOTS),
-					\RecursiveIteratorIterator::CHILD_FIRST
-				);
-
-				foreach ($it as $file)
-				{
-					$name = $file->getFilename();
-
-					if ($name === 'index.html' || $name === '.htaccess')
-					{
-						continue;
-					}
-
-					if ($file->isDir())
-					{
-						@rmdir($file->getPathname());
-					}
-					else
-					{
-						@unlink($file->getPathname());
-					}
-				}
-			}
+			$cache->createCacheController('', $options)->cache->clean('');
 
 			// Clear opcache if available
 			if (\function_exists('opcache_reset'))