Site v0.3.1 — LLM-citation hardening + mobile polish + logomark

Thirteen atomic ships (audit-and-fix waves 8 → 20) consolidated. No methodology change. LLM-citation infrastructure: AEO FAQPage schema on /methodology/ + /track-record/ + /; source-class DefinedTermSet with visible microdata on /beta/; machine-readable /api/source-classes.json with stable @id values pointing at /sources/#<slug>; 14-DefinedTerm knowsAbout entity graph on Organization (every page) + Person (/about/); outbound citation graph on Brier 1950 + Murphy 1973 + Tetlock 2015 with DOIs + ISSN + Wikipedia sameAs; anchored Glossary section on /methodology/ closing 5 broken #term-X anchors. Drift cleanup: 5 stale ForecastLens cross-refs redirected to /track-record/, 2 numeric drifts on homepage (Six→Eight surfaces, 11→10 cited), 11 stale DATE_MODIFIED constants bumped, footer hardcoded 2026-04-26 now sourced from single SITE_VERIFIED constant in layout.tsx. Brand mark: calibration-curve logomark replaces "CL" monogram on /icon.svg + /apple-icon (first-time PNG; was 404) + opengraph-image + every-page header inline SVG — three measured calibration points landing on a dotted ideal-calibration diagonal inside an L-axis frame; literal reliability-diagram glyph. Mobile polish: hero h1 mobile-tightened with text-balance, defensive overflow-wrap CSS for inline code + URLs, hyphens-auto on body prose ≤640px, -webkit-overflow-scrolling on overflow-x regions. Cross-links from /partners/ + /about/ to live /beta/ + /track-record/ surfaces. Site now passes Aleyda Solis 10-characteristic LLM-citation checklist on every structural axis except Corroborated (operator-only Wikipedia/LinkedIn/Reddit corroboration is parallel-track).