fix: persist markers after ontoolresult sets viewUUID

Markers from ontoolinput are added before viewUUID is available,
so persistMarkers() was a no-op. Now explicitly persist after
ontoolresult finishes setting up viewUUID and all markers.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: ochafik

examples/map-server/src/mcp-app.ts

@@ -1359,6 +1359,12 @@ app.ontoolresult = async (result) => {
     );
   }
 
+  // Ensure all current markers are persisted (initial markers from ontoolinput
+  // were added before viewUUID was set, so persistMarkers() was a no-op then)
+  if (viewUUID && markerMap.size > 0) {
+    persistMarkers();
+  }
+
   // Start polling for commands now that we have viewUUID
   if (viewUUID) {
     startPolling();