dsh-showreel: Turning DeepSeek Harness Task Generation into a 30-Second Vertical Battle Report

`dsh-showreel` is a local browser-based DeepSeek Harness plugin that converts an Agent's task execution process into an approximately 30-second vertical video briefing. It extracts the five key stages of the most recent Turn—Goal, Execution, Verification, Outcome, and Wrap-Up—along with data summaries, and uses real-time Canvas rendering at 30 FPS to automatically generate 1080×1920 MP4 or WebM videos and a cover thumbnail. It supports pre-export editing of the copy and duration, AI-assisted polishing, and OpenAI-compatible voiceover. Throughout, the plugin maintains read-only access to the Session and masks sensitive information (such as API keys and full logs) to ensure data security.