fix: Fix app name not translated in the title of public pages

@nextcloud/vue automatically adds the localized app name to the page
title if a page heading but not an explicit page title is given. The
localized app name is expected to be provided in the "core->apps"
initial state, but that was set only when rendering a page as a
registered user. In public pages that data was not provided, so the
title contained the app ID rather than the localized app name.

Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>

Author: danxuliu

lib/private/TemplateLayout.php

@@ -157,6 +157,8 @@ public function getPageTemplate(string $renderAs, string $appId): ITemplate {
 				$page->assign('appid', $appId);
 				$page->assign('bodyid', 'body-public');
 
+				$this->initialState->provideInitialState('core', 'apps', array_values($this->navigationManager->getAll()));
+
 				// Set logo link target
 				$logoUrl = $this->config->getSystemValueString('logo_url', '');
 				$page->assign('logoUrl', $logoUrl);