* Show: Presenter View only with a second display
With one display the presenter window opened on the same screen as the show. Under Hyprland's
focus-follows-mouse, whichever window the pointer was over took full screen, and the hidden one
stalled every frame: the show lagged, dropped key presses or froze.
One display now shows only the slides, as in PowerPoint. The host counts displays through winit's
monitor list when a show starts; hosts that can't tell keep Presenter View.
* Show: count displays by MonitorHandle
Wayland lists one output twice under the same wl_output id, so comparing handles counts it once, and two separate displays with the same name and geometry still count as two.
* Show: docs for Presenter View with a second display
slideshow-parity and hardware-parity note that on Linux one display shows only the slides, with status lines and revision history; ROADMAP progress log. display_count collects into a BTreeSet (MonitorHandle's Ord matches its Eq).
* Show: docs state the one-display rule exactly
Presenter View stays off when winit lists exactly one display; if it lists none, the setting is kept. The host callback covers Unix other than macOS, so the docs say Linux and the BSDs.
* Apply review fixes
- docs/slideshow-parity.md
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Co-authored-by: aiongg <67543387+aiongg@users.noreply.github.com>
Michael Müllerandaiongg
73de9900a7