fix(pdp-image-white-bg): product detail image card background must be white

work/artifacts/PDP-IMAGE-WHITE-BG/documenter.md

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+# PDP-IMAGE-WHITE-BG
+
+## Change
+Product detail page image card now has a white background instead of light gray.

work/artifacts/PDP-IMAGE-WHITE-BG/implementer.md

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+# Implementer evidence — PDP-IMAGE-WHITE-BG
+
+## Resumen
+Cambiado `bg-gray-50` → `bg-white` en la tarjeta de imagen del producto en `/products/[slug]/page.tsx`.
+
+## Cambio
+Línea 114: `bg-gray-50 rounded-2xl` → `bg-white rounded-2xl`
+
+## Validación
+- `cd project/frontend && npm run build` ✅
+- `git diff --check` ✅

work/artifacts/PDP-IMAGE-WHITE-BG/leader-close.json

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+{"feature_id":"PDP-IMAGE-WHITE-BG","agent":"leader","stage":"close","verdict":"APPROVED","summary":"PDP-IMAGE-WHITE-BG cerrada.","gates_summary":{"reviewer":"APPROVED","security":"APPROVED","qa":"APPROVED"},"timestamp":"2026-08-26T18:34:25Z"}

work/artifacts/PDP-IMAGE-WHITE-BG/qa.json

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+{"feature_id":"PDP-IMAGE-WHITE-BG","agent":"qa","stage":"qa_gate","verdict":"APPROVED","qa_check":"qa","summary":"QA aprobado: build limpio.","test_results":{"automated":["cd project/frontend && npm run build ✅","git diff --check ✅"]},"timestamp":"2026-08-26T18:34:20Z"}

work/artifacts/PDP-IMAGE-WHITE-BG/reviewer.json

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+{"feature_id":"PDP-IMAGE-WHITE-BG","agent":"reviewer","stage":"review_gate","verdict":"APPROVED","summary":"Fix trivial: bg-gray-50 → bg-white en image card de PDP.","checks":[{"item":"Fondo blanco en PDP","ok":true}],"issues":[],"evidence":["cd project/frontend && npm run build","git diff --check"],"timestamp":"2026-08-26T18:34:10Z"}

work/artifacts/PDP-IMAGE-WHITE-BG/security.json

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+{"feature_id":"PDP-IMAGE-WHITE-BG","agent":"security","stage":"security_gate","verdict":"APPROVED","security_check":"security","summary":"Cambio CSS puro, sin implicaciones de seguridad.","timestamp":"2026-08-26T18:34:15Z"}