[AI] Reset loadingSimpleFinAccounts before early return in INVALID_ACCESS_TOKEN branch

The early return for INVALID_ACCESS_TOKEN skipped the
setLoadingSimpleFinAccounts(false) call at the end of the handler,
leaving the spinner active and clicks disabled.

https://claude.ai/code/session_01CmcFHWUhqo3eC2joAWrtWM

packages/desktop-client/src/components/modals/CreateAccountModal.tsx

@@ -86,6 +86,7 @@ export function CreateAccountModal({
     try {
       const results = await send('simplefin-accounts');
       if (results.error_code === 'INVALID_ACCESS_TOKEN') {
+        setLoadingSimpleFinAccounts(false);
         dispatch(
           pushModal({
             modal: {