dsh-webchatlike: Implementing Web-based Chat Operations in DeepSeek Harness

dsh-webchatlike is a MIT-licensed client plugin for DeepSeek Harness (DSH) designed to replicate the convenient chat experience of the DeepSeek web/app interface. Its core features include: supporting hover-to-edit user messages and resending; one-click regeneration of Assistant responses; providing `<i/N>` version pagination next to messages, similar to deepseek.com, for easy comparison of different response versions in the same conversation turn; supporting forking conversation trees into independent copies; and offering sidebar session folding and deletion (ongoing sessions cannot be deleted). This plugin has a relatively high installation barrier, requiring the execution of a source code patch script to modify the `ui-conversation` and `ui-workspace` components, followed by the installation of dependencies.