feat: techspec additions — de novo tier-6 branch, structure export, page capture + final synthesis

feat(theme): dual light/dark mode with Apple light theme, toggle, and theme-aware viewers

feat(export): add downloads to ADMET, MD, pairwise, AlphaFold, docking, pathway, plus 4 new learn topics

Refine design system: semantic color tokens, tiered motion, denser result cards, VinaLog toolbar

feat(frontend): HUD glass design system + clay components

feat: add interaction fingerprinting and 3Dmol.js viewer to molecular docking page

named exports, any->unknown, theme toggle (light/dark), dark mode fixes, error extractor, deleted pipline/ typo dir

AlphaFold 3D viewer via 3Dmol.js — pLDDT confidence coloring, style selector, spin toggle