Manages niri Wayland compositor settings and noctalia v5 desktop integration. Config stored in `~/.config/niri/cfg/misc.kdl`. Reload via `niri msg reload` or `kill -USR1 $(pidof niri)`. Default browser: Firefox. Cursor: `capitaine-cursors`, size 48px. Wallpaper rotates from repo-tracked dir. Live runtime flip handled by single-instance guard.