feat(frontend): datos de demo embebidos (demo autosuficiente en Vercel)#29
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La demo dependía del backend .NET + mock en Render free, que se duermen y provocaban 'No hay datos' / 502 al abrir en frío. Como el dashboard ya calcula todos los agregados en cliente, ahora el frontend trae un dataset de ejemplo embebido y lo usa como fuente por defecto: - frontend/app/lib/sample-sales.json: 25 ventas ficticias (fixtures del mock). - fetchDashboard: usa BACKEND_URL si responde con datos; si no (sin URL, caído, vacío o timeout) cae al dataset embebido. La demo carga al instante, siempre, sin depender de Render. - DEMO.md: documenta el montaje (front en Vercel, datos embebidos, backend opcional y cómo conectarlo). README y DEPLOY actualizados. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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La demo dependía del backend .NET + mock en Render free, que se duermen y provocaban "No hay datos" / 502 al abrir en frío. Como el dashboard ya calcula todos los agregados en cliente, ahora el frontend es autosuficiente.
Cambios
frontend/app/lib/sample-sales.json: dataset embebido (25 ventas ficticias, fixtures del mock).fetchDashboard: usaBACKEND_URLsi responde con datos; si no (sin URL, caído, vacío o timeout) cae al dataset embebido. La demo carga al instante, siempre, sin depender de Render.DEMO.md(nuevo): documenta el montaje — front en Vercel, cómo coge los datos de prueba, dónde está el backend y cómo conectarlo si se quiere. README y DEPLOY actualizados.Por qué
Vercel/GitHub Pages/Cloudflare son hosts de frontend; ninguno corre el backend .NET gratis sin dormir. La solución real no es cambiar de host sino quitar la dependencia del backend para la demo. Sigue en Vercel (ya configurado); basta con dejar
BACKEND_URLvacío.Verificación
lint✅ ·test:run✅ (31) ·build✅🤖 Generated with Claude Code