dsh-more-message-actions: DSH Web Enhanced Message Actions Plugin

This plugin aims to add message editing, retry, and deletion features to the DeepSeek Harness (DSH) Web GUI. The installation command is `dsh plugin --profile web add github:suzuran520yyz/dsh-more-message-actions`. The plugin adds Edit, Modify and Retry, Retry, Advanced Retry, and Delete buttons to the message toolbar. It works by coordinating between the Host and the browser side, rewriting persistent logs, resetting cursors, and triggering Agent replay. When using it, note that operations can only be performed when the session is idle, and retry-related features support only pure-text turns, not turns containing image attachments. Deleting an AI response also removes its chain of thought, while editing changes only the text and does not regenerate it. Please review carefully before use.