fix: added check for tests

Author: dastrong-codiga

src/renderer/components/Layout/TitlebarButtonsMac.tsx

@@ -4,7 +4,7 @@ import TitlebarButton from './TitlebarButton';
 import CodigaLogo from './CodigaIcon.png';
 
 export default function TitlebarActionsMac() {
-  if (!window.electron.isMac) {
+  if (!window.electron?.isMac) {
     return <Image src={CodigaLogo} h="24px" ml="space_16" />;
   }
 

src/renderer/components/Layout/TitlebarButtonsWin.tsx

@@ -11,7 +11,7 @@ const buttonStyles = {
 };
 
 export default function TitlebarActionsWin() {
-  if (window.electron.isMac) return null;
+  if (window.electron?.isMac) return null;
 
   return (
     <Flex>