Golden officially added an Index and Signages; the event does not explain where to open them or what they cost or change.
Use the official feature names as the boundary, then verify current controls and prices inside your own game.
Index and Signages are separate verified Golden additions; their controls, costs, and effects remain unknown. The current-version checklist separates verified existence for Index and Signages, observable UI and result notes, unknown controls, costs and effects, stuck states, FAQs, and Golden source next actions.