8 inputs → 58 body params: putting a body-model forward pass inside the training loss [P]

Small MLP (2 layers × 256 units, ~85 KB) that accurately predicts 58 Anny body-shape parameters from 8 questionnaire inputs: height, weight, gender, body shape, build, belly, cup size, ancestry. Trains in ~120 minutes on a laptop. Architecturally boring — the loss is the interesting part. Results (f