feat(deck): configure initial NixOS host for Steam Deck

Renames the 'steam' system to 'deck' in flake.nix and sets up the
initial NixOS profile for the Steam Deck. This includes disk
partitioning with disko, a basic hardware configuration, and
enables the Jovian module for Steam Deck specific optimizations.
The previous 'profiles/steam' configuration has been removed.

flake.nix

@@ -146,12 +146,12 @@
         ];
       };
 
-      steam = nixpkgs.lib.nixosSystem {
+      deck = nixpkgs.lib.nixosSystem {
         system = "x86_64-linux";
         specialArgs = {inherit inputs;};
         modules = [
           ./profiles/common
-          ./profiles/steam/configuration.nix
+          ./profiles/deck/configuration.nix
           ./services
         ];
       };

hosts/deck/disko.nix

@@ -0,0 +1,29 @@
+{
+  disko.devices.disk.main = {
+    type = "disk";
+    device = "/dev/nvme0n1"; # SSD interne, ou "/dev/mmcblk0" pour un essai sur microSD
+    content = {
+      type = "gpt";
+      partitions = {
+        ESP = {
+          type = "EF00";
+          size = "1G";
+          content = {
+            type = "filesystem";
+            format = "vfat";
+            mountpoint = "/boot";
+            mountOptions = ["umask=0077"];
+          };
+        };
+        root = {
+          size = "100%";
+          content = {
+            type = "filesystem";
+            format = "ext4";
+            mountpoint = "/";
+          };
+        };
+      };
+    };
+  };
+}

hosts/deck/hardware-configuration.nix

@@ -0,0 +1 @@
+{}

modules/home/neovim/default.nix

@@ -15,8 +15,7 @@
     # # colorschemes.catppuccin.enable = true;
     opts = import ./options.nix;
     keymaps = import ./keymaps.nix;
-    clipboard.register = "unnamedplus";   # yank => presse-papier direct
-
+    clipboard.register = "unnamedplus"; # yank => presse-papier direct
 
     filetype = {
       extension = {
@@ -25,10 +24,11 @@
     };
 
     plugins = {
+      web-devicons.enable = true;
       lsp.servers.nil_ls = {
         enable = true;
         settings."nil".nix.flake = {
-          autoArchive = false;   # ou true pour fetch en silence
+          autoArchive = false; # ou true pour fetch en silence
           # autoEvalInputs = false;
         };
       };
@@ -69,7 +69,7 @@
         enable = true;
         settings = {
           ui.border = "rounded";
-          lightbulb.enable = false;  # évite le spam si pas de LSP actif
+          lightbulb.enable = false; # évite le spam si pas de LSP actif
         };
       };
       treesitter = {

profiles/deck/configuration.nix

@@ -0,0 +1,15 @@
+{lib, ...}: {
+  imports = [
+    ../../hosts/deck/disko.nix
+    ../../hosts/deck/hardware-configuration.nix
+    ../../modules/nixos/jovian
+  ];
+
+  jovian.devices.steamdeck.enable = true;
+
+  boot.loader.systemd-boot.enable = true;
+  boot.loader.efi.canTouchEfiVariables = true;
+
+  networking.hostName = "deck";
+  system.stateVersion = lib.mkForce "26.05"; # install neuve
+}

profiles/steam/configuration.nix

@@ -1,22 +0,0 @@
-{
-  lib,
-  pkgs,
-  inputs,
-  ...
-}: {
-  imports = [
-    ../../hosts/tower/disko.nix
-    ../../hosts/laptop/hardware-configuration.nix
-  ];
-
-  networking.firewall = {
-    enable = true;
-  };
-
-  specialisation.gamescope.configuration = {
-    imports = [../../modules/nixos/jovian];
-  };
-
-  networking.hostName = "tower";
-  sops.defaultSopsFile = lib.mkForce ../../secrets/tower.yml;
-}