Fix false implant relabeling, watermark flood, LLM refusal leak

Swap fracture YOLO weights to GRAZPEDWRI-DX model, fix suppression bug

Fix hardware-detection false positive on bright X-rays

Lower fracture cross-check threshold 60->50

Fix fracture detection, routing, file-size limit, single box, AI reasoning leak

Sync backend from GitHub main

fix: repair health chat and rewrite the diet planner for Pakistani home food

initial deploy