Use PHP rendering for statistics page

Skip Twig template and use direct PHP rendering for
better stability and debugging.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/Admin/AnalyticsController.php

@@ -303,27 +303,7 @@ class AnalyticsController
     {
         $stats = $this->licenseManager->getStatistics();
 
-        // Render using Twig if available
-        $plugin = \Jeremias\WcLicensedProduct\Plugin::getInstance();
-        $twig = $plugin->getTwig();
-
-        if ($twig) {
-            try {
-                echo $twig->render('admin/statistics.html.twig', [
-                    'stats' => $stats,
-                    'admin_url' => admin_url('admin.php'),
-                    'rest_url' => rest_url('wc-licensed-product/v1/analytics/'),
-                ]);
-                return;
-            } catch (\Twig\Error\Error $e) {
-                // Any Twig error - fall through to PHP fallback
-                if (defined('WP_DEBUG') && WP_DEBUG) {
-                    error_log('WC Licensed Product Twig Error: ' . $e->getMessage());
-                }
-            }
-        }
-
-        // Fallback PHP rendering
+        // Use PHP rendering directly for stability
         $this->renderStatisticsPageFallback($stats);
     }