feat(web): plan de cuentas como SAP (árbol con grupos y nivel al lado del formulario; propiedades, costos e info detallada)

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

tools/sap.http

@@ -0,0 +1,16 @@
+@url=https://SAP10:50000/b1s/v1
+###
+# @noRejectUnauthorized
+POST {{url}}/Login
+Content-Type: application/json
+
+{
+    "CompanyDB": "SBODemoCL",
+    "UserName": "manager",
+    "Password": "mngr"
+}
+
+
+###
+# @noRejectUnauthorized
+GET {{url}}/ChartOfAccounts('1-1-040-10-000')