Lead with Sankey as navigation view; unify into Catalog views tabs

Lead with bubble chart; list every modality on one line (scrollable); treemap moves to Zoom out tab

Add EEGDash assets, logo, social icons, recording badge, plots (treemap/growth/sankey/clinical); favicon+PNGs via LFS

Redesign Space UI: hero, modality strip, HTML detail cards, Okabe-Ito palette