New endpoints: save.cfm (combined add/update) and delete.cfm
(soft-delete with item unassignment). Registered in Application.cfm.
Portal station-assignment page now uses real API calls for add,
edit, and delete instead of client-side-only prompt(). Fixed key
naming mismatch (StationName/StationColor → Name/Color) so the
page works with real API data. Removed hardcoded demo fallbacks.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
