[BUGFIX] Ensure further variable fallback checks in EXT:felogin

With #106942 changes were made to prevent PHP type errors / exceptions
in case the EXT:felogin TypoScript was not included.

Two spots were missed, which is addressed by this patch.

Resolves: #106994
Related: #106942
Releases: main, 13.4
Change-Id: I4da4c91ba96e40cffd028f9a8503c527b09efc8f
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/89930
Tested-by: core-ci <typo3@b13.com>
Tested-by: Torben Hansen <derhansen@gmail.com>
Reviewed-by: Garvin Hicking <garvin@hick.ing>
Tested-by: Oli Bartsch <bo@cedev.de>
Tested-by: Garvin Hicking <garvin@hick.ing>
Reviewed-by: Oli Bartsch <bo@cedev.de>
Reviewed-by: Torben Hansen <derhansen@gmail.com>

Author: garvinhicking

typo3/sysext/felogin/Classes/Configuration/RecoveryConfiguration.php

@@ -155,10 +155,10 @@ protected function resolveFromTypoScript(): void
                 );
             }
         }
-        $this->mailTemplateName = (string)$this->settings['email']['templateName'];
+        $this->mailTemplateName = (string)($this->settings['email']['templateName'] ?? '');
         if (empty($this->mailTemplateName)) {
             throw new IncompleteConfigurationException(
-                'Key "plugin.tx_felogin_login.settings.email.templateName" cannot be empty!',
+                'Key "plugin.tx_felogin_login.settings.email.templateName" cannot be empty! Ensure that TypoScript is properly included.',
                 1584998393
             );
         }

typo3/sysext/felogin/Classes/Service/RecoveryService.php

@@ -101,7 +101,7 @@ protected function prepareMail(RequestInterface $request, Address $receiver, str
             'receiverName' => $receiver->getName(),
             'userData' => $userData,
             'url' => $url,
-            'validUntil' => date($this->settings['dateFormat'], $this->recoveryConfiguration->getLifeTimeTimestamp()),
+            'validUntil' => date($this->settings['dateFormat'] ?? 'Y-m-d H:i', $this->recoveryConfiguration->getLifeTimeTimestamp()),
         ];
 
         $mailTemplatePaths = $this->recoveryConfiguration->getMailTemplatePaths();