new `modules/media.nix`: mpv (with mpv-gallery-view) for video/audio, imv for
images. imv key binds run per-file actions — copy path via `wl-copy`, rotate/
flip via `magick`, delete, open in gimp, show `mediainfo`. wallpaper via awww
plus a `setbg` wrapper (symlink to ~/.local/share/bg + live push); awww-daemon
and boot restore wired as hyprland exec-once. add mako as the notification
daemon backing the notify-send toasts.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
