feat(F-075): completed feature

work/artifacts/F-075/architect.md

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+# F-075 — Architect: Inline edit SKU/EAN/STOCK in inventory module; remove Actions column
+
+## Current state
+
+`inventory/page.tsx` has:
+- SKU displayed as plain text (no edit capability)
+- EAN displayed as plain text (no edit capability)
+- Stock inline edit via ✏️ button in the Stock column
+- Empty "Acción" column header (th with no corresponding td in tbody — vestigial)
+
+The backend has `PATCH /products/:id/variants/:variantId` which accepts `sku` and `ean` fields. This endpoint is accessible via the admin proxy.
+
+## Goal
+
+1. Make **SKU**, **EAN**, and **Stock** editable inline by clicking on the cell
+2. Remove the vestigial "Acción" column (th with no corresponding td)
+3. Add `updateVariant` to `productsApi` in the admin API client
+
+## Scope IN
+
+- `project/apps/admin/src/lib/api-client.ts`:
+  - Add `updateVariant(productId, variantId, data)` to `productsApi`
+
+- `project/apps/admin/src/app/(dashboard)/inventory/page.tsx`:
+  - Extend `VariantRow` interface with `editingSku`, `editSkuValue`, `editingEan`, `editEanValue` states
+  - Add `handleSaveSku` and `handleSaveEan` functions calling `productsApi.updateVariant`
+  - Make SKU cell: click on text → shows input → save on Enter/blur
+  - Make EAN cell: click on text → shows input → save on Enter/blur
+  - Stock: click on value (not just ✏️) to enter edit mode
+  - Remove the "Acción" column header (th) and its row in the table
+
+## Scope OUT
+
+- No backend changes (endpoint already exists)
+- No changes to the product editor (PricingSection, InventorySection)
+
+## Design
+
+SKU cell (click-to-edit):
+```tsx
+{row.editingSku ? (
+  <input
+    autoFocus
+    value={row.editSkuValue}
+    onChange={e => setRows(prev => prev.map(r =>
+      r.variant.id === row.variant.id ? { ...r, editSkuValue: e.target.value } : r))}
+    onBlur={() => handleSaveSku(row.variant.id, row.productId, row.editSkuValue)}
+    onKeyDown={e => { if (e.key === 'Enter') handleSaveSku(...); if (e.key === 'Escape') ...; }}
+    className="w-full px-2 py-1 border border-[#2D6A4F] rounded text-xs focus:ring-1 focus:ring-[#2D6A4F]"
+  />
+) : (
+  <button onClick={() => setRows(prev => prev.map(r =>
+      r.variant.id === row.variant.id ? { ...r, editingSku: true, editSkuValue: row.variant.sku } : r))}
+    className="font-mono text-xs text-gray-600 hover:text-[#2D6A4F] cursor-text text-left w-full truncate"
+    title="Clic para editar"
+  >
+    {row.variant.sku}
+  </button>
+)}
+```
+
+EAN cell: same pattern for EAN.
+
+Stock cell: same pattern, but click on the value (not just ✏️).
+
+## Risk
+
+- **Low risk**: purely frontend changes, no backend or DB changes
+- SKU uniqueness validation: backend returns error if duplicate SKU, caught and displayed
+
+## Verification
+
+- `npx tsc --noEmit` admin
+- `npx eslint` on changed files
+- `./scripts/verify.sh` green
+- Manual: click on SKU → edit → save; same for EAN and Stock