feat: Anatomical Region Selector — body map + dropdown inject region into prompt

feat: AMD Live Inference Dashboard — show latency, throughput, token count after each analysis

fix: enforce target-language output for diagnosis/actions, keep severity in English for stable parsing

fix: move language selector global + fix diagnosis prompt echo bug

feat: multilingual support (ZH/ES/FR/JA) + remove all mock mode

Production update: full Gradio app with AMD branding, mock+real mode, bilingual support