Frontend redesign: branded hero header, Soft theme + CSS cards, decluttered two-column layout, polished plots, grouped examples

SPARK v4 outer-sphere ET demo (continuous-manifold model + alternative mechanisms)

Rebrand TRACE -> SPARK

Expand mechanism full-name labels (CV: 9 ID + 4 OOD; TPD: 11 ID + 2 OOD)

Posteriors: legend for mean/median markers; footer: drop Built at MIT

UI polish: card layout, per-mechanism detail tabs, mode radio

Initial TRACE deployment: rebrand from ECFlow + noise-aug headline checkpoints