Guard custom api mode overrides

Author: PeterDaveHello

src/background/index.mjs

@@ -389,10 +389,10 @@ async function executeApi(session, port, config) {
           port,
           session.question,
           session,
-          session.apiMode.customUrl.trim() ||
+          session.apiMode.customUrl?.trim() ||
             config.customModelApiUrl.trim() ||
             'http://localhost:8000/v1/chat/completions',
-          session.apiMode.apiKey.trim() || config.customApiKey,
+          session.apiMode.apiKey?.trim() || config.customApiKey,
           session.apiMode.customName,
         )
     } else if (isUsingChatgptWebModel(session)) {