fix(nixos): screen blank after inactivity

nixos/configuration.nix

@@ -1,9 +1,11 @@
 {
+  inputs,
   config,
   pkgs,
   ...
 }: {
   imports = [
+    inputs.home-manager.nixosModules.default
     ./hardware-configuration.nix
   ];
 
@@ -99,6 +101,15 @@
     ghostscript
   ];
 
+  home-manager.users.mudics = {
+    xfconf.settings = {
+      xfce4-power-manager."xfce4-power-manager/dpms-enabled" = false;
+      xfce4-screensaver."saver/enabled" = false;
+    };
+
+    home.stateVersion = "25.05";
+  };
+
   systemd.services.update-mudics = {
     wantedBy = ["multi-user.target"];
     after = ["network-online.target"];

nixos/flake.lock

@@ -1,5 +1,26 @@
 {
   "nodes": {
+    "home-manager": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1763992789,
+        "narHash": "sha256-WHkdBlw6oyxXIra/vQPYLtqY+3G8dUVZM8bEXk0t8x4=",
+        "owner": "nix-community",
+        "repo": "home-manager",
+        "rev": "44831a7eaba4360fb81f2acc5ea6de5fde90aaa3",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "ref": "release-25.05",
+        "repo": "home-manager",
+        "type": "github"
+      }
+    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1761999846,
@@ -18,6 +39,7 @@
     },
     "root": {
       "inputs": {
+        "home-manager": "home-manager",
         "nixpkgs": "nixpkgs"
       }
     }

nixos/flake.nix

@@ -1,6 +1,11 @@
 {
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.05";
+
+    home-manager = {
+      url = "github:nix-community/home-manager/release-25.05";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
   };
 
   outputs = {
@@ -15,6 +20,7 @@
       };
       modules = [
         ./configuration.nix
+        inputs.home-manager.nixosModules.default
       ];
     };
   };