feat(F-100): completed feature

work/artifacts/F-100/leader-close.json

@@ -0,0 +1,15 @@
+{
+  "feature_id": "F-100",
+  "agent": "leader",
+  "verdict": "APPROVED",
+  "summary": "F-100 derives a SKU from the product title, dedupes against existing SKUs, and exposes both a preview endpoint and an editable input in the admin Prices & Stock section. Legacy products without a variant get a title-derived SKU on next read.",
+  "evidence": [
+    "reviewer.json APPROVED",
+    "security.json APPROVED",
+    "qa.json APPROVED",
+    "npm test 169 passed / 0 failed (9 new)",
+    "backend tsc + admin tsc clean",
+    "backend build OK"
+  ],
+  "timestamp": "2026-08-21T13:30:00Z"
+}