dsh-sidebar-explorer-plus: DeepSeek Harness Sidebar File Management

dsh-sidebar-explorer-plus is a file management plugin developed specifically for the DeepSeek Harness sidebar, addressing the lack of write support in the native Explorer. Built with TypeScript and React, it allows users to directly upload, move, rename, delete, and open files from the sidebar. Installation requires Node.js 20 and a compatible dsh-better-sidebar version, and the upload size limit can be configured (default 50 MiB). The plugin uses the Host API to handle file system operations, supports drag-and-drop uploads, and includes security checks to ensure safe operation within trusted workspaces, streamlining file management during development.