Added optional hub site selection module for identifying county-level nutrient recovery hub locations across CONUS.
Optional CDL raster integration (requires terra + exactextractr)
refines demand signal by cropland intensity fraction.
New vignette: "Hub Site Selection for Nutrient Recovery Operations".
Shiny dashboard updated with Hub Selection tab: interactive Leaflet suitability map, top sites table, and cross-score robustness table.
compare_scenarios() for side-by-side scenario comparisonlaunch_dashboard() for interactive Shiny interfacesize aesthetic (changed to linewidth)