Adds persistent fluid sim sidebar with scene system (oracle, keywords,
featured-claim, project-preview, matrix scenes). New /lab page with
interactive project cards. Markdown-for-agents system generates .md
versions of all pages at /md/ paths with MdToggle in nav.
Post-launch polish: denser 44x100 grid (was 32x80), terminal chrome on
both panels, oracle input always visible below sim, cursor tracking fix.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
kbanc85