[BUGFIX] Prevent application type exception in ViewHelper

In case the "f:format.html" ViewHelper is called
in the install tool or via CLI, there might be either
no request object or one without an application
type. This led to an exception on checking the
application type.

This is now fixed by checking the request before
calling the static ApplicationType check.

Resolves: #96788
Releases: main, 11.5
Change-Id: I1e48a3556d510d2af82d4f95828d44c182db0663
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/73422
Tested-by: core-ci <typo3@b13.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Oliver Bartsch <bo@cedev.de>

typo3/sysext/fluid/Classes/ViewHelpers/Format/HtmlViewHelper.php

@@ -17,6 +17,7 @@
 
 namespace TYPO3\CMS\Fluid\ViewHelpers\Format;
 
+use Psr\Http\Message\ServerRequestInterface;
 use TYPO3\CMS\Core\Http\ApplicationType;
 use TYPO3\CMS\Core\Utility\GeneralUtility;
 use TYPO3\CMS\Extbase\Configuration\ConfigurationManagerInterface;
@@ -146,8 +147,11 @@ public static function renderStatic(array $arguments, \Closure $renderChildrenCl
         $current = $arguments['current'];
         $currentValueKey = $arguments['currentValueKey'];
         $table = $arguments['table'];
-        $isBackendRequest = ApplicationType::fromRequest($renderingContext->getRequest())->isBackend();
 
+        $request = $renderingContext->getRequest();
+        $isBackendRequest = $request instanceof ServerRequestInterface
+            && $request->getAttribute('applicationType')
+            && ApplicationType::fromRequest($request)->isBackend();
         if ($isBackendRequest) {
             $tsfeBackup = self::simulateFrontendEnvironment();
         }