- Add shared skeleton building blocks (SkeletonHero, SkeletonMetricRow,
SkeletonPanel, SkeletonRows) and wire them into every view's initial
loading branch, replacing bare spinners for a cohesive shimmering shell.
- Polish EmptyState with a glow-ring icon chip instead of a flat icon.
- Harden .light theme: color-scheme, tuned scrollbar + selection for pale
canvas. Dark/light theme toggle (next-themes) already persisted in TopBar.