- Add SiteShell (rail nav + workspace + footer) and wrap /blog and
/blog/[slug] in it so they share the site's dark chrome instead of
rendering as bare standalone pages.
- Style rendered post HTML (.blog-content) for the dark workspace.
- Links were `color: inherit` everywhere, so content-area links matched
body text and were invisible. Give links a distinct accent (#5ac8a6);
keep the rail nav and buttons on their own colors.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
