dsh-selection-toolbar

The `dsh-selection-toolbar` plugin provides a complete selected-text interaction solution for DeepSeek Harness. It displays a floating toolbar above the selection, supporting copy, citation, inline questions, and actions such as explain, translate, and summarize. The core `/btw` side-question feature operates independently without polluting the conversation history, answers based solely on the context, and displays results in a modal dialog. Users can flexibly configure the selection delay, feature toggles, and answer destination in settings, and freely switch between the main conversation and side questions for efficient handling of context fragments.