dsh-attachment: Adding File and Folder Attachment Capabilities to DeepSeek Harness

dsh-attachment is a plugin developed by WJZ-P under the MIT license, designed for the DeepSeek Harness (DSH) web interface. It aims to enhance the handling of regular files and folders, supporting persistence to the workspace while preserving directory structure without altering the original input area layout. Core features include supporting folder drag-and-drop with internal directory tree retention, preview and streaming download of regular files, coexistence with native image attachments, and writing attachments to specified paths for model access. The plugin integrates in a low-intrusive manner, suitable for scenarios requiring complex file structure handling, attachment history retention, and ensuring models can read data based on explicit paths. Users can easily install it into the DSH web profile via npm commands, with attachments automatically synced to the workspace after submission. Note before use: the plugin