Fix opentopomap x/y, allow searching in release when not offline

lib/dev_config.dart

@@ -43,6 +43,24 @@ const bool kEnableDevelopmentModes = false; // Set to false to hide sandbox/simu
 // Navigation features - set to false to hide navigation UI elements while in development
 const bool kEnableNavigationFeatures = kEnableDevelopmentModes; // Hide navigation until fully implemented
 
+/// Search availability: dev builds always, release builds only when online
+bool enableSearchFeatures({required bool offlineMode}) {
+  if (kEnableDevelopmentModes) {
+    return true; // Dev builds: always allow search
+  } else {
+    return !offlineMode; // Release builds: only when online
+  }
+}
+
+/// Navigation availability: only dev builds, and only when online
+bool enableNavigationFeatures({required bool offlineMode}) {
+  if (!kEnableDevelopmentModes) {
+    return false; // Release builds: never allow navigation
+  } else {
+    return !offlineMode; // Dev builds: only when online
+  }
+}
+
 // Marker/node interaction
 const int kCameraMinZoomLevel = 10; // Minimum zoom to show nodes (Overpass)
 const int kOsmApiMinZoomLevel = 13; // Minimum zoom for OSM API bbox queries (sandbox mode)