dsh-file-bridge: DeepSeek Harness Bidirectional File Exchange Bridge

The DSH (DeepSeek Harness) File Bridge plugin provides file transfer capabilities in conversational scenarios. It supports bidirectional file exchange through three methods: the attachment button, tool-based delivery, and path navigation. Features include automatic image compression, native preview, static file serving, and protection against path traversal. Installation requires running the specified command and restarting the service, followed by configuring the public URL and storage directory in the configuration file. During use, users can click the attachment button to upload files, while the Agent can call a tool to deliver files and reference source file paths wrapped in backticks within replies to invoke the sidebar manager. When deploying, take note of Nginx request body size limits and file selection compatibility issues on the app client.