patiodeck: add steam deck LCD host

hosts/patiodeck/default.nix

@@ -0,0 +1,66 @@
+{
+  pkgs,
+  lib,
+  username,
+  inputs,
+  site_config,
+  ...
+}:
+{
+  imports = [
+    ../../modules/desktop-common.nix
+    ../../modules/desktop-steam-update.nix
+    ./disk.nix
+    ./impermanence.nix
+
+    inputs.impermanence.nixosModules.impermanence
+    inputs.jovian-nixos.nixosModules.default
+  ];
+
+  networking.hostId = "a1b2c3d4";
+
+  # SSH for remote management from laptop
+  services.openssh = {
+    enable = true;
+    ports = [ 22 ];
+    settings = {
+      PasswordAuthentication = false;
+      PermitRootLogin = "yes";
+    };
+  };
+
+  users.users.${username}.openssh.authorizedKeys.keys = [
+    site_config.ssh_keys.laptop
+  ];
+
+  users.users.root.openssh.authorizedKeys.keys = [
+    site_config.ssh_keys.laptop
+  ];
+
+  nixpkgs.config.allowUnfreePredicate =
+    pkg:
+    builtins.elem (lib.getName pkg) [
+      "steamdeck-hw-theme"
+      "steam-jupiter-unwrapped"
+      "steam"
+      "steam-original"
+      "steam-unwrapped"
+      "steam-run"
+    ];
+
+  jovian = {
+    devices.steamdeck.enable = true;
+    steam = {
+      enable = true;
+      autoStart = true;
+      desktopSession = "niri";
+      user = username;
+    };
+  };
+
+  # Jovian-NixOS requires sddm
+  services.displayManager.sddm.wayland.enable = true;
+
+  # disable gamescope from desktop-common.nix to avoid conflict with jovian
+  programs.gamescope.enable = lib.mkForce false;
+}