fix(checkout-returnto): checkout login: return user to checkout after sign in

work/runtime-status.json

@@ -1,34 +1,13 @@
 {
-  "feature_id": "CLUB-003",
-  "stage": "close",
-  "agent": "leader",
-  "action": "Cerrar CLUB-003",
+  "feature_id": "CHECKOUT-RETURNTO",
+  "stage": "build",
+  "agent": "implementer",
+  "action": "Implementar redirect post-login/register con returnTo",
   "state": "running",
-  "next_agent": "leader",
-  "waiting_for": "close",
-  "updated_at": "2026-08-26T18:16:10Z",
+  "next_agent": "reviewer",
+  "waiting_for": "build",
+  "updated_at": "2026-08-26T18:30:58Z",
   "timeline": [
-    {
-      "ts": "2026-08-26T17:20:42Z",
-      "agent": "security",
-      "stage": "security_gate",
-      "state": "running",
-      "message": "Revisión de seguridad de la PWA Club"
-    },
-    {
-      "ts": "2026-08-26T17:21:02Z",
-      "agent": "security",
-      "stage": "security_gate",
-      "state": "done",
-      "message": "Revisión de seguridad aprobada para CLUB-002"
-    },
-    {
-      "ts": "2026-08-26T17:21:07Z",
-      "agent": "qa",
-      "stage": "qa_gate",
-      "state": "running",
-      "message": "QA de la PWA Club"
-    },
     {
       "ts": "2026-08-26T17:21:25Z",
       "agent": "qa",
@@ -147,6 +126,27 @@
       "stage": "close",
       "state": "running",
       "message": "Cerrar CLUB-003"
+    },
+    {
+      "ts": "2026-08-26T18:30:31Z",
+      "agent": "architect",
+      "stage": "design",
+      "state": "running",
+      "message": "Analizar redirect post-login y diseñar returnTo checkout"
+    },
+    {
+      "ts": "2026-08-26T18:30:44Z",
+      "agent": "architect",
+      "stage": "design",
+      "state": "done",
+      "message": "Diseño completado: returnTo query param en login/register y en checkout"
+    },
+    {
+      "ts": "2026-08-26T18:30:58Z",
+      "agent": "implementer",
+      "stage": "build",
+      "state": "running",
+      "message": "Implementar redirect post-login/register con returnTo"
     }
   ]
 }