Add One-click Draft Polish to DeepSeek Harness Input Box with dsh-composer-polish

`dsh-composer-polish` is a DeepSeek Harness Web UI plugin maintained by tianji-qingtian. It adds a ✨ Polish button to the input box toolbar, uses deepseek-v4-flash to rewrite drafts without any prefix, and fills the rewritten content back into the input box without sending messages or moving images. The installation command on the directory page is `dsh plugin add github:tianji-qingtian/dsh-composer-polish`. It is recommended to pin the v0.1.3 version of the repository, add it to the web profile and restart the service. The plugin runs with the permissions of the current dsh process, so you should check the source code and the MIT license before installation.