Replaces the bespoke doc-page chrome with the app's real components:
DashboardSidebar shell (256px, rgba(0,0,0,.25) + 18px blur, staggered
nav-item entrance), the AnimatedLogo neode mark with its 20 staggered
squares, sidebar-nav-item + nav-tab-active for section state, and the
Settings wallpaper behind it all.
Every bespoke container (.card/.card-sm/.step/.score-card/.callout-*/
.diagram) is gone — .glass-card from style.css is now the only box on
the page, with layout-only grids inside it.
Scroll-spy lives in nav.js rather than inline, since the node's CSP is
script-src 'self'.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
