fix: Correctly detect appid for dist css files

Follow-up of ab551c4

Signed-off-by: Côme Chilliet <come.chilliet@nextcloud.com>

Author: come-nc

lib/private/TemplateLayout.php

@@ -384,7 +384,10 @@ private function findStylesheetFiles(array $styles): array {
 	public function getAppNamefromPath(string $path): string|false {
 		if ($path !== '') {
 			$pathParts = explode('/', $path);
-			if ($pathParts[0] === 'css') {
+			if ($pathParts[0] === 'dist') {
+				// Return the part before the dash in the file name
+				return explode('-', \array_last($pathParts), 2)[0];
+			} elseif ($pathParts[0] === 'css') {
 				// This is a scss request
 				return $pathParts[1];
 			} elseif ($pathParts[0] === 'core') {