routing link crossover violation added

tests/layout-ui-wiring.test.js

@@ -92,9 +92,11 @@ assert(
     canvasHtml.includes('onConnect={handleBasicConnection}') &&
     canvasHtml.includes('nodesConnectable={true}') &&
     canvasHtml.includes('connectionMode="loose"') &&
+    canvasHtml.includes('const conflict = findSameTypeRouteCrossing(candidate, activePage.edges, nodeMap, technologyManifest);') &&
+    canvasHtml.includes('Connection rejected:') &&
     canvasHtml.includes('data: { route }') &&
     canvasHtml.includes('addEdge(candidate, p.edges)'),
-  'canvas should use React Flow native pin-to-pin connections for new links'
+  'canvas should use React Flow native pin-to-pin connections and reject same-xsection crossings for new links'
 );
 assert(
   !canvasHtml.includes('linkDraft') &&