feat(F-094): completed feature

work/artifacts/F-094/implementer.md

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+# F-094 — Implementer evidence
+
+## Changes
+
+- Added `VariantManager` to the Publish tab with a plain-language explanation of variants, SKU, and EAN.
+- Added SKU-required/EAN-optional variant creation using the existing `POST /products/:id/variants` API.
+- Added existing variant list and inline success/conflict feedback.
+- Added `productsApi.createVariant`.
+- Updated Pricing and Inventory empty states to point to the now-existing Publish workflow.
+
+## Validation
+
+- Admin `npx tsc --noEmit` → exit 0
+- Admin ESLint on touched files → 0 errors (pre-existing warnings only)

work/artifacts/F-094/leader-close.json

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+{
+  "feature_id": "F-094",
+  "agent": "leader",
+  "verdict": "APPROVED",
+  "summary": "F-094 adds an understandable variant creation workflow to Publish and fixes the misleading empty-state guidance.",
+  "evidence": [
+    "reviewer.json verdict=APPROVED",
+    "security.json verdict=APPROVED",
+    "qa.json verdict=APPROVED",
+    "Root tests: 133 passed, 56 skipped",
+    "scripts/verify.sh exit 0"
+  ],
+  "timestamp": "2026-08-20T20:01:50Z"
+}

work/artifacts/F-094/qa.json

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+{
+  "feature_id": "F-094",
+  "agent": "qa",
+  "verdict": "APPROVED",
+  "summary": "Publish variant management passes admin checks, the root test suite, and harness verification.",
+  "evidence": [
+    "Admin npx tsc --noEmit exit 0",
+    "Admin ESLint touched files exit 0 with warnings only",
+    "Root tests: 133 passed, 56 skipped",
+    "scripts/verify.sh exit 0"
+  ],
+  "timestamp": "2026-08-20T20:01:40Z"
+}

work/artifacts/F-094/reviewer.json

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+{
+  "feature_id": "F-094",
+  "agent": "reviewer",
+  "verdict": "APPROVED",
+  "summary": "Publish now contains a clear variant workflow backed by the existing create/list endpoints, and empty states point to a real action.",
+  "evidence": [
+    "VariantManager explains sellable variants, SKU, and EAN",
+    "Create form uses SKU required and EAN optional",
+    "Successful creation updates the list without reload",
+    "Duplicate API conflicts are shown to the operator",
+    "Pricing and Inventory messages no longer reference a missing UI"
+  ],
+  "timestamp": "2026-08-20T20:01:10Z"
+}

work/artifacts/F-094/security.json

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+{
+  "feature_id": "F-094",
+  "agent": "security",
+  "verdict": "APPROVED",
+  "summary": "The UI uses the existing authenticated admin variant endpoint; server-side SKU/EAN validation and uniqueness remain authoritative.",
+  "evidence": [
+    "No new backend route or authorization bypass",
+    "SKU is required in the UI and backend schema validates all fields",
+    "Duplicate SKU/EAN remains rejected by database constraints",
+    "No secrets, unsafe HTML, or dependencies added"
+  ],
+  "timestamp": "2026-08-20T20:01:20Z"
+}