feat(F-072): completed feature

work/artifacts/F-072/qa.json

@@ -0,0 +1,20 @@
+{
+  "feature_id": "F-072",
+  "agent": "qa",
+  "verdict": "APPROVED",
+  "summary": "F-072 fully implemented. Migration applied. API verified. Typecheck and verify.sh green.",
+  "evidence": [
+    "AC1 'PricingSection fetches active tax rates from GET /admin/tax-rates' — taxApi.list() called in useEffect, active rates filtered and stored in state, mapped to dropdown options",
+    "AC2 'Dropdown shows all active rates dynamically' — activeTaxRates.map() renders option per active rate; fallback shows 2 original options if API fails",
+    "AC3 'VAT calculation uses fetched rate percentages instead of hardcoded constants' — grossCents = Math.round(netCents * (1 + ratePercent / 100)) where ratePercent comes from activeTaxRates.find()",
+    "AC4 'verify.sh is green' — exit 0, 145 features valid",
+    "Migration 031 applied successfully to dev DB",
+    "npx tsc --noEmit backend exit 0",
+    "npx tsc --noEmit admin exit 0",
+    "npx eslint on changed files exit 0",
+    "API: PUT /pricing/variants/:id with vatRate='super-reduced' → HTTP 200, variant saved with super-reduced",
+    "API: GET /pricing/variants/:id confirms vatRate='super-reduced' persisted",
+    "API: GET /admin/tax-rates returns all 3 active rates including 4% super-reduced"
+  ],
+  "timestamp": "2026-08-19T17:24:00Z"
+}