Centralize domain stats retrieval in LayoutHelper

Moved domain statistics logic into a new LayoutHelper::getDomainStats() method. Updated base layout and dashboard view to use this helper, reducing code duplication and improving maintainability.

app/Helpers/LayoutHelper.php

@@ -35,6 +35,23 @@ class LayoutHelper
     }
     
     
+    /**
+     * Get domain statistics (centralized function for views)
+     */
+    public static function getDomainStats(): array
+    {
+        $domainModel = new \App\Models\Domain();
+        $userId = \Core\Auth::id();
+        $settingModel = new \App\Models\Setting();
+        $isolationMode = $settingModel->getValue('user_isolation_mode', 'shared');
+        
+        if ($isolationMode === 'isolated') {
+            return $domainModel->getStatistics($userId);
+        } else {
+            return $domainModel->getStatistics();
+        }
+    }
+
     /**
      * Convert timestamp to "time ago" format
      */