dsh-desktop: An OS-Level Desktop Control Plugin

`dsh-desktop` is a host plugin maintained by Hyna-hla that provides models with OS-level desktop control capabilities, addressing the limitations of web content control. Its core features include locating elements via OCR, clicking, dragging, text input, and simulating keyboard shortcuts, with support for Chinese text and multi-window operations. Once installed, the plugin runs with host process privileges and is not subject to DSH sandbox restrictions, allowing it to complement the Edge extension. The model invokes high-privileged tools only when instructed, and users should carefully review the source code and license.