agent foundation

lib/Service/User/UserTenantContextService.php

@@ -32,6 +32,7 @@ class UserTenantContextService
             return null;
         }
 
+        // Priority: last-used tenant → primary tenant → first available.
         $currentTenantId = (int) ($user['current_tenant_id'] ?? 0);
         if ($currentTenantId > 0 && in_array($currentTenantId, $activeTenantIds, true)) {
             return $currentTenantId;