Fix error by \r ; append error message to history

ChatGPT returns \r\n for new line. \r causes error
Error message are appended to the last code chunk. This way, it will not return the same code, even if user click the submit button twice.

typo

minor edits

UI

Merge pull request #55 from gexijin/deploy

Updates from deploy branch

Merge pull request #20 from gexijin/log_code

Add GGally package as dependency

Update README.md