fix(helpdesk): fix Session class not found in software products form

Use fully qualified \MintyPHP\Session in _form.phtml and remove
duplicate CSRF token call from edit template (already in form partial).

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

modules/helpdesk/pages/helpdesk/software-products/_form.phtml

@@ -45,5 +45,5 @@ $formId = $formId ?? 'software-product-form';
     </div>
   </div>
 
-  <?php Session::getCsrfInput(); ?>
+  <?php \MintyPHP\Session::getCsrfInput(); ?>
 </form>

modules/helpdesk/pages/helpdesk/software-products/edit(default).phtml

@@ -53,8 +53,6 @@ $active = (int) ($values['active'] ?? 1);
     <?php endif; ?>
 
     <?php require __DIR__ . '/_form.phtml'; ?>
-
-    <?php Session::getCsrfInput(); ?>
   </section>
 
   <aside id="app-details-aside-section">