dsh-prompt-refine: DeepSeek Harness Prompt Patch Optimization Plugin

dsh-prompt-refine is a DeepSeek Harness (DSH) plugin designed to automatically patch missing elements in user prompts through context-aware refinement. The plugin provides a ✨ button next to the send button in the input box. When clicked, it invokes the configured model to analyze the current draft and conversation history, generating three suggestions that include identified issues and suggested patches. Users can select the desired suggestions, preview the merged prompt in real time, and insert it into the input box, enabling lightweight, non-intrusive prompt optimization without additional configuration.