make a streams map for reports

The challenge is to display streams, such as the NHD Flowlines, for a large area (e.g. a US State), with certain streams "highlighted" through symbology, like this: 

<img width="566" height="509" alt="Image" src="https://github.com/user-attachments/assets/26ad5f56-7576-42e7-8228-0cc991d1e39a" />