dsh-design-qa

给纯文本模型的设计稿保真判定：`deepseek_vision` 工具从任意 OpenAI 兼容视觉路由借来一只眼，让模型判断实现与设计稿是否一致——并附上支撑该判定的基准（4 组夹具、23 处注入缺陷、逐格原始输出）与其依赖的提问纪律。

Design-fidelity QA for text-only models: a `deepseek_vision` tool borrows an eye from any OpenAI-compatible vision route, so the model can judge whether an implementation matches its mock — shipped with the benchmark behind that judgement (four fixtures, 23 injected defects, raw transcripts) and the questioning discipline it depends on.