Fix conflicting audio role config: remove pulseaudio, keep pipewire

Remove services.pulseaudio configuration that conflicted with
services.pipewire. PipeWire replaces PulseAudio and provides
compatibility through pulse.enable.

Also added alsa.enable and alsa.support32Bit for better ALSA support.

flake.nix

@@ -162,6 +162,7 @@
       modules = nixosModules ++ [
         nixos-wsl.nixosModules.default
         ./machines/wixos/configuration.nix
+        inputs.home-manager.nixosModules.home-manager
         {
           home-manager.users.johno = import ./home/home-desktop.nix;
           home-manager.extraSpecialArgs = { inherit system; };
@@ -173,6 +174,7 @@
       system = "x86_64-linux";
       modules = nixosModules ++ [
         ./machines/zix790prors/configuration.nix
+        inputs.home-manager.nixosModules.home-manager
         {
           home-manager.users.johno = import ./home/home-desktop.nix;
           home-manager.extraSpecialArgs = { inherit system; };

roles/audio/default.nix

@@ -21,6 +21,8 @@ in
 
       services.pipewire = {
         enable = true;
+        alsa.enable = true;
+        alsa.support32Bit = true;
         pulse.enable = true;
       };