fix(system): finalize VM stabilization and fix Hyprland syntax

- Restore custom SDDM theme.
- Clean up all remaining Hyprland windowrulev2 and layerrule syntax errors.
- Optimize VM configurations with 4GB RAM and virtio-vga graphics for stability.
- Remove diagnostic debug services and autologin debug settings.
- Ensure correct session autologin to hyprland-uwsm.

modules/home/hyprland.nix

@@ -28,7 +28,6 @@ in
         "swww-daemon & sleep 0.5 && swww img ${activeWallpaper} --transition-type none"
         "nomarchy-on-boot"
         "nomarchy-welcome"
-        "alacritty"
       ] ++ (lib.optional config.nomarchy.toggles.waybar "waybar");
       "bind" = [
         "SUPER, Space, exec, walker"