Use the new "form-fetch-action" for better user experience, and use
JSONError to show error messages.
---------
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
While editing frontend, I found some inconsistencies while testing
transferring repositories:
- No button for accepting/rejecting/cancelling the transfer of an empty
repository.
- The `redirect_to` in `templates/repo/header.tmpl` is useless.
- There's no redirection when there's an error from `handleActionError`
in `routers/web/repo/repo.go`. Therefore, instead of flash message, a
blank page will be displayed.
This pr adds some commits to resolve all these issues.
Update: see the new changes
https://github.com/go-gitea/gitea/pull/37277#issuecomment-4276150232
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: Giteabot <teabot@gitea.io>
