feat(F-159): completed feature

work/artifacts/F-159/security.json

@@ -0,0 +1,13 @@
+{
+  "feature_id": "F-159",
+  "agent": "security",
+  "stage": "security_gate",
+  "verdict": "APPROVED",
+  "summary": "Solo se persiste una preferencia booleana no sensible; no cambian auth, permisos ni destinos de navegación.",
+  "checks": [
+    {"item":"No sensitive storage","ok":true,"evidence":"localStorage contains only collapsed boolean"},
+    {"item":"RBAC preserved","ok":true,"evidence":"Navigation remains filtered by visibleNavItems(role)"},
+    {"item":"No dependency change","ok":true,"evidence":"Uses React and existing Tailwind only"}
+  ],
+  "issues": []
+}