Previous fullscreen detection had two blind spots:
1. Workspace scan used wayland?.fullscreen (unreliable) and missed qs -p windows
2. HyprlandData.activeWindow fallback only saw the focused window — missed
fullscreen apps that lost focus to layer-shell surfaces (dock, notifications)
Now scans HyprlandData.windowList (hyprctl clients -j) for any window with
fullscreen === 2 on the focused monitor. Source of truth for all windows,
not just the active one. Reactive via HyprlandData's event-driven updates.
Co-Authored-By: Claude <noreply@anthropic.com>
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