fix(order-status-labels): admin order status labels should be lowercase and unified

work/runtime-status.json

@@ -2,11 +2,11 @@
   "feature_id": "CHECKOUT-STOCK-RECHECK",
   "stage": "build",
   "agent": "implementer",
-  "action": "Corregir bg-gray-50 a bg-white en tarjeta de imagen PDP",
+  "action": "Corregir PROCESSING label a En preparación en admin orders",
   "state": "running",
   "next_agent": "reviewer",
   "waiting_for": "build",
-  "updated_at": "2026-08-26T18:35:14.244053Z",
+  "updated_at": "2026-08-26T18:36:27.180044Z",
   "timeline": [
     {
       "ts": "2026-08-26T17:21:37Z",
@@ -175,6 +175,27 @@
       "stage": "build",
       "state": "running",
       "message": "Corregir bg-gray-50 a bg-white en tarjeta de imagen PDP"
+    },
+    {
+      "ts": "2026-08-26T18:35:39.383535Z",
+      "agent": "architect",
+      "stage": "design",
+      "state": "running",
+      "message": "Buscar y mejorar etiquetas de estado de pedido"
+    },
+    {
+      "ts": "2026-08-26T18:36:27.180044Z",
+      "agent": "architect",
+      "stage": "design",
+      "state": "done",
+      "message": "Diseño: PROCESSING Procesando → En preparación"
+    },
+    {
+      "ts": "2026-08-26T18:36:27.180044Z",
+      "agent": "implementer",
+      "stage": "build",
+      "state": "running",
+      "message": "Corregir PROCESSING label a En preparación en admin orders"
     }
   ],
   "gates": {