Duhai Vision: Universal Vision Model Adapter for DeepSeek Harness

`duhai-vision` is a general-purpose visual model plugin compatible with Codex and DSH, designed to provide auditable visual processing for long documents, tables, and complex layouts. It prioritizes PaddleOCR-VL by default, uses Qwen as a fallback, and supports returning structured data. Installation requires configuring a Paddle Token and adding the plugin via the command line. The image processing workflow is: save the image hash path -> extract structure with PaddleOCR-VL -> reason with DeepSeek. The plugin offers a free quota of 3,000 pages, but users should be aware of privacy risks associated with remote services.