feat(F-159): completed feature

work/artifacts/F-159/leader-close.json

@@ -0,0 +1,14 @@
+{
+  "feature_id":"F-159",
+  "agent":"leader",
+  "stage":"close",
+  "verdict":"APPROVED",
+  "summary":"SidebarToggle responsive, persistente y accesible completado.",
+  "checks":[
+    {"item":"reviewer","ok":true},
+    {"item":"security","ok":true},
+    {"item":"qa","ok":true},
+    {"item":"build and verify","ok":true}
+  ],
+  "issues":[]
+}