Implements a three-tier hotkey backend chain on Linux:
1. xdg-desktop-portal GlobalShortcuts — works on Hyprland, GNOME, and KDE
without any privilege setup; requires one bind line in hyprland.conf for Hyprland
2. evdev — fallback for users in the input group or with systemd-logind seat ACLs
3. X11 XGrabKey — last resort for plain X11 sessions
Fixes double-fire on Hyprland by filtering signals by sig.Name to guard
against Deactivated events leaking through the Activated match rule.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
On Wayland, XGrabKey via XWayland is not forwarded by most compositors.
The new Linux implementation tries evdev first (works on Wayland and X11
without compositor-specific support — requires 'input' group or systemd-logind
seat ACLs, which GNOME/KDE grant automatically). Falls back to X11 XGrabKey
for plain X11 sessions or when evdev devices aren't accessible. The log now
records which backend was selected.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
richard