v0.29.1

Marketing site (routekit.dev): Plausible privacy-friendly analytics (self-hosted script tag, no npm dependency); the real UX287 highway-marker logo in the header sub-brand, replacing the fabricated shield (now removed from Hero and Footer); self-hosted Overpass Black display face for the Routekit Shell wordmark (no third-party font CDN, keeping visitor IPs off Google); an enlarged header lockup; a new full-viewport "Model economics" pane covering how rks routes work to a small model first and escalates only when the work earns it; and the deep-dive cards now link to the UX287 blog. No framework changes — marketing surface is publish-excluded and does not ship to the public repo.