Stylix set polarity and the GTK theme but not the XDG portal's
org.freedesktop.appearance color-scheme, which GTK4/libadwaita and Qt6
apps actually read to choose dark vs light — so a light theme could still
render those apps dark (and vice-versa).
Set dconf org/gnome/desktop/interface color-scheme to
prefer-light/prefer-dark from theme.mode in stylix.nix.
xdg-desktop-portal-gtk already ships and programs.dconf is on system-side,
so the portal exposes it to apps.
Also log two branding follow-ups from the legacy assets: fastfetch ASCII
logo (logo.txt) and the Nomarchy.ttf glyph for the Waybar menu button.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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