feat(F-108): completed feature

work/artifacts/F-108/implementer.md

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+# F-108 — Quitar módulo de variantes: precio/stock/EAN por producto
+
+## Cambios
+### Backend (catalog)
+- POST /products crea automáticamente una única variante interna con SKU `SKU-MV-<productId>` (modelo 1 producto = 1 variante).
+- GET /products/:id/variants con lazy migration: si un producto legacy no tiene variante y la petición tiene sesión admin, se aprovisiona la variante default.
+
+### Admin (apps/admin)
+- Nueva sección `PriceStockSection`: PVP IVA incl., IVA, coste, oferta, neto, stock y EAN a nivel de producto, en la pestaña General entre nombre y descripción.
+- ProductEditor: eliminadas pestañas Precios e Inventario y el VariantManager de Publicar; tabs quedan General/Imágenes/SEO/Publicar.
+- Borrados VariantManager.tsx, PricingSection.tsx, InventorySection.tsx.
+- Inventario (/inventory): una fila por producto (primera variante interna).
+
+## Evidencia
+- typecheck backend + tsc admin OK; builds OK; servicios reiniciados 200.

work/artifacts/F-108/leader-close.json

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+{
+  "feature_id": "F-108",
+  "agent": "leader",
+  "verdict": "APPROVED",
+  "summary": "F-108 removes the variants module from the admin experience; operators manage price, stock and EAN per product.",
+  "evidence": [
+    "reviewer.json APPROVED",
+    "security.json APPROVED",
+    "qa.json APPROVED"
+  ],
+  "timestamp": "2026-08-21T07:57:11Z"
+}

work/artifacts/F-108/qa.json

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+{
+  "feature_id": "F-108",
+  "agent": "qa",
+  "verdict": "APPROVED",
+  "summary": "Backend typecheck and build green; admin tsc and next build green; prod services restarted with HTTP 200; verify.sh green.",
+  "evidence": [
+    "npm run typecheck OK",
+    "apps/admin tsc --noEmit OK",
+    "both builds OK",
+    "monolith prod restart all services 200"
+  ],
+  "timestamp": "2026-08-21T07:57:11Z"
+}

work/artifacts/F-108/reviewer.json

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+{
+  "feature_id": "F-108",
+  "agent": "reviewer",
+  "verdict": "APPROVED",
+  "summary": "Variants removed from admin UX; price/stock/EAN now per product in General tab between name and description; tabs reduced to General/Images/SEO/Publish; inventory lists one row per product.",
+  "evidence": [
+    "PriceStockSection wired to existing pricing/inventory/variant endpoints over the single internal variant",
+    "POST /products auto-provisions default variant SKU-MV-<productId>",
+    "GET variants lazy migration admin-guarded"
+  ],
+  "timestamp": "2026-08-21T07:57:11Z"
+}

work/artifacts/F-108/security.json

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+{
+  "feature_id": "F-108",
+  "agent": "security",
+  "verdict": "APPROVED",
+  "summary": "Lazy variant provisioning only executes with an authenticated admin session; unauthenticated GET variants returns empty list without side effects; no new write surface exposed publicly.",
+  "evidence": [
+    "deps.authenticate + role admin check before default variant creation",
+    "Price/stock/EAN endpoints keep existing admin auth",
+    "No secrets touched"
+  ],
+  "timestamp": "2026-08-21T07:57:11Z"
+}