ReadonlyconfigReadonlyisReadonlyversionClose whichever mask overlay is currently active.
Close a named mask overlay and optionally skip mask state sync.
Open a named mask overlay, closing any previously active one.
Register a named mask overlay with open/close/isActive handlers.
Toggle the mask element's blur class based on active overlay state.
Toggle a named mask overlay open/closed.
Core module — shared state initialization and mask overlay management.
Responsibilities:
window.config.isDark/themeModeaccessors.