feat(F-075): completed feature

work/artifacts/F-075/implementer.md

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+# F-075 — Implementer evidence: Inline edit SKU/EAN/STOCK in inventory module; remove Actions column
+
+## Problem
+
+The inventory page had:
+1. SKU and EAN displayed as plain text (no edit capability)
+2. Stock editable via a small ✏️ button, but not by clicking the value itself
+3. Vestigial "Acción" column header (th) with no corresponding data cell (td) in tbody
+
+## Changes
+
+### API client
+`project/apps/admin/src/lib/api-client.ts`:
+- Added `updateVariant(productId, variantId, data)` to `productsApi` — calls `PATCH /api/products/:productId/variants/:variantId`
+
+### Inventory page
+`project/apps/admin/src/app/(dashboard)/inventory/page.tsx`:
+- Extended `VariantRow` interface with `editingSku`, `editSkuValue`, `savingSku`, `editingEan`, `editEanValue`, `savingEan` fields
+- Added `handleSaveSku(variantId, productId, newSku)` — calls `productsApi.updateVariant`, updates local variant state on success
+- Added `handleSaveEan(variantId, productId, newEan)` — calls `productsApi.updateVariant` with ean (null if empty), updates local variant on success
+- **SKU cell**: click on text → input appears (autoFocus) → save on Enter or blur, cancel on Escape
+- **EAN cell**: same pattern as SKU
+- **Stock cell**: click on the quantity value itself (not just ✏️) → enters edit mode
+- Removed the "Acción" column header (th) and its empty corresponding data cell (td) — the `msg` feedback is now removed from the table (it's still set in state but not displayed in the table)
+- All editing states reset properly on Escape or save
+
+## Verification
+
+- `npx tsc --noEmit` admin — exit 0 ✅
+- `npx eslint` on changed files — exit 0 ✅
+- `./scripts/verify.sh` — exit 0 ✅
+
+## Files touched
+
+```
+project/apps/admin/src/lib/api-client.ts                                (modified)
+project/apps/admin/src/app/(dashboard)/inventory/page.tsx                (modified)
+work/artifacts/F-075/implementer.md                                   (this file)
+```