feat(F-055): completed feature

work/artifacts/F-055/qa.json

@@ -0,0 +1,45 @@
+{
+  "feature_id": "F-055",
+  "stage": "qa_gate",
+  "agent": "qa",
+  "ts": "2026-08-19T11:48:50Z",
+  "verdict": "APPROVED",
+  "checks": [
+    {
+      "name": "all_4_services_200",
+      "status": "PASS",
+      "detail": "backend 3000, frontend 3003, admin 3004, storefront 3005"
+    },
+    {
+      "name": "original_image_serves",
+      "status": "PASS",
+      "detail": "GET /uploads/<uuid>.jpg returns 200 with 129711 bytes"
+    },
+    {
+      "name": "40px_thumb_serves_all_apps",
+      "status": "PASS",
+      "detail": "GET /uploads/40/<uuid>.jpg returns 200 with 1155 bytes on admin, frontend, storefront"
+    },
+    {
+      "name": "200px_thumb_serves_admin",
+      "status": "PASS",
+      "detail": "GET /uploads/200/<uuid>.jpg returns 200 with 12164 bytes"
+    },
+    {
+      "name": "sync_uploads_idempotent",
+      "status": "PASS",
+      "detail": "generate-thumbnails.sh re-runs are no-ops for cached thumbnails"
+    },
+    {
+      "name": "typecheck_clean",
+      "status": "PASS",
+      "detail": "All three apps: tsc --noEmit green"
+    },
+    {
+      "name": "verify_sh_green",
+      "status": "PASS",
+      "detail": "scripts/verify.sh exit 0"
+    }
+  ],
+  "notes": "All acceptance criteria satisfied. 129KB original → 1.2KB/12KB thumbnails."
+}