dsh-suggest-reply: Sidebar Candidate Reply Generation Tool

`dsh-suggest-reply` is a sidebar plugin based on DeepSeek Harness, designed to help users generate candidate lines for AI replies. Users define tasks and JSON format through a custom System Prompt; the plugin automatically reads the latest message and optional director requirements to generate a style list. The generation process is isolated from the main session and supports real-time streaming debugging, parameter configuration, and one-click insertion of results. The plugin depends on `dsh-better-sidebar`, providing a clean, standalone generation experience.