pub fn frontmost_bundle_id() -> Option<String>Expand description
Return the macOS bundle identifier of the currently frontmost application,
e.g. "com.microsoft.VSCode". None when no app is frontmost, when
reading the value fails, or on any non-macOS platform (P1.4).
Costs four objc_msgSends plus a UTF-8 copy — well under a millisecond
at the 1 Hz polling cadence in openlogi-gui::app_watcher.