DeepSeek Harness Plugin: dsh-plugin-web-ppt

`dsh-plugin-web-ppt` is a pure JavaScript plugin for DeepSeek Harness, designed to process PPT files directly within the environment without requiring internet access or an Office installation. It provides three core tools—reading, SVG rendering, and export to printable HTML—and supports both .pptx and .ppt formats. It manages file read and write access through Harness’s permission system, with features including a 64 MB file size limit, support for encrypted files, and export of animation steps. This plugin addresses the pain points of presentation handling in agent workflows and offers a native, secure solution.