dsh-client-paste-image: Converting Pasted Images to File Paths in a Text-Only Model

The DeepSeek Harness plugin dsh-client-paste-image is designed to address the issue that pure text models cannot receive images. It intercepts image paste operations in the composer, uses `dsh-drop-caret` to upload the image and insert the generated file path into the input field, thereby allowing the text model to reference the image in context or pass it to subsequent visual tools. The plugin can be bypassed with `Alt+Paste` and only takes effect for configured text routes; it requires installing `dsh-drop-caret` and is enabled after restarting the service.