refs #19222 [finc] fix specific error messages

* unwrap BackendException to get TimeoutException
* use camelCase for systemEmail view helper in exception templates

module/finc/src/finc/Bootstrapper.php

@@ -74,7 +74,11 @@ class Bootstrapper extends \VuFind\Bootstrapper
                 return;
             }
 
-            $exceptionArray = explode('\\', get_class($e->getParam('exception')));
+            if ($exception instanceof \VuFindSearch\Backend\Exception\BackendException && $exception->getPrevious()) {
+                $exception = $exception->getPrevious();
+            }
+
+            $exceptionArray = explode('\\', get_class($exception));
             $exceptionName = end(
                 $exceptionArray
             );
@@ -90,7 +94,7 @@ class Bootstrapper extends \VuFind\Bootstrapper
             $model = new \Zend\View\Model\ViewModel(
                 [
                 'display_exceptions' => APPLICATION_ENV == 'development',
-                'exception'          => $e->getParam('exception'),
+                'exception' => $e->getParam('exception'),
                 ]
             );
             $model->setTemplate($template);

themes/finc/templates/error/RuntimeException.phtml

@@ -14,7 +14,7 @@
     <?php else: ?>
       <p><?=$this->transEsc($this->message)?></p>
       <?=$this->transEsc('Please contact the Library Reference Department for assistance')?>
-      <?php $supportEmail = $this->escapeHtmlAttr($this->systememail()); ?>
+      <?php $supportEmail = $this->escapeHtmlAttr($this->systemEmail()); ?>
       <a href="mailto:<?=$supportEmail?>"><?=$supportEmail?></a>
     <?php endif; ?>
     <br/>

themes/finc/templates/error/TimeoutException.phtml

@@ -8,7 +8,7 @@
 ?>
 <div class="alert alert-danger">
   <p>
-    <?=sprintf($this->translate('error_timeout'), $this->systememail(), $this->systememail())?>
+    <?=sprintf($this->translate('error_timeout'), $this->systemEmail(), $this->systemEmail())?>
     <br/>
   </p>
 </div>