Add reviewer overview figure, drop duplicate training SVGs, sync Hub showcase

Shorten Hub dataset notes in README, Blog, and Hub README

Tone down Hub dataset copy: neutral navigation, no trashing own plots

Hub dataset: root README with viewer disabled; document in README and Blog

Refresh plots, showcase upload script, and docs for Hub results

submission: Membrane docs, training/eval artifacts, HF jobs scripts; docs plots as SVG only (HF Space git binary hook)