DuoPane: Two-pane file manager for Mac that opens 5 GB logs instantly

Hi Product Hunt! After 25 years in Total Commander on Windows I couldn't find the same keyboard-first workflow on the Mac, so I wrote one in Swift/AppKit. DuoPane is two panes, F3/F4/F5–F8, drive letters, a command line under the panels – plus a viewer that opens multi-gigabyte logs instantly, an editor, SFTP/FTPS and iCloud Drive as ordinary panels, archives browsed like folders, and a built-in REST client. Settings sync between Macs through iCloud. No Electron, no tracking, Czech and English. 14 days free, then a free tier; Personal $19/year or $59 lifetime. It launched last week as "zCommander" and was renamed because of a clash with an older Mac App Store app. Happy to answer anything.