feat: enlarge the size of the next button for uploading files and add locale config to global.ts (#195)

fix: fixed the issue that the prompt word for registering an account is not in English and fixed the issue where the last message would keep loading if the backend reported an error during chat and fixed the issue where the next button would float above the file list on the file upload page (#133)

feat: save the selected parser to the backend on the upload file page and upload document (#54)