Maps were not rendering in flutter_map v6.2.1 because TileLayer was missing the
required userAgentPackageName property. This property is needed for proper
HTTP requests to tile servers with correct User-Agent headers.
- Updated TileLayer in genericMap.dart with userAgentPackageName
- Updated TileLayer in monitoredAreas.dart with userAgentPackageName
- Fixes: Maps not displaying tiles after flutter_map v6 migration