Toolbar and pane context menu create placeholders that follow the same setup path as LLDP in NE management and WebCRT.
Co-authored-by: Cursor <cursoragent@cursor.com>
Extract ume_support/ume_router and alarms_router so main stays startup-focused, add topology fabric/views import surfaces, and gate managed-NE writes by ne:write.
Co-authored-by: Cursor <cursoragent@cursor.com>