fix: migrate swww to awww, add per-user GTK4 symlinks

swww was renamed to awww (codeberg.org/LGFae/awww). Update package
list, README references, and add compatibility symlinks in post-install
so waypaper keeps working until it supports awww natively.

Also add per-user ~/.config/gtk-4.0/ symlinks — libadwaita ignores the
system-wide /etc/xdg/ fallback, so apps like Nautilus need user-level
CSS links to pick up the Catppuccin theme.

scripts/post-install.sh

@@ -117,6 +117,14 @@ if [[ -d "$THEME_GTK4" ]]; then
     # Assets symlink: remove first if exists (ln -sf on directories follows the link)
     sudo rm -f "$GTK4_XDG/assets"
     sudo ln -s "$THEME_GTK4/assets" "$GTK4_XDG/assets"
+    # libadwaita only reads user CSS from ~/.config/gtk-4.0/, not /etc/xdg/ fallback.
+    # Create per-user symlinks so the theme applies to libadwaita apps (e.g. Nautilus).
+    USER_GTK4="$HOME/.config/gtk-4.0"
+    mkdir -p "$USER_GTK4"
+    ln -sf "$THEME_GTK4/gtk-dark.css" "$USER_GTK4/gtk.css"
+    ln -sf "$THEME_GTK4/gtk-dark.css" "$USER_GTK4/gtk-dark.css"
+    rm -f "$USER_GTK4/assets"
+    ln -s "$THEME_GTK4/assets" "$USER_GTK4/assets"
 else
     err "GTK4 theme not found: $THEME_GTK4 — libadwaita apps will use fallback theme."
 fi
@@ -134,6 +142,14 @@ gsettings set org.gnome.desktop.interface font-name 'UbuntuSans Nerd Font 11'
 log "Installing Moonarch helper scripts to /usr/local/bin/..."
 sudo install -m 755 "$DEFAULTS_DIR/bin/moonarch-"* /usr/local/bin/
 
+# --- awww compatibility symlinks (waypaper still calls swww) ---
+
+if command -v awww &>/dev/null && ! command -v swww &>/dev/null; then
+    log "Creating swww -> awww compatibility symlinks..."
+    sudo ln -s /usr/bin/awww /usr/local/bin/swww
+    sudo ln -s /usr/bin/awww-daemon /usr/local/bin/swww-daemon
+fi
+
 # --- Zsh configuration ---
 
 log "Installing Zsh default config..."