several improvements to nixos config

configs/thilo-pc/nixos.nix

@@ -1,7 +1,7 @@
 # Edit this configuration file to define what should be installed on
 # your system.  Help is available in the configuration.nix(5) man page
 # and in the NixOS manual (accessible by running ‘nixos-help’).
-{ pkgs, options, ... }:
+{ pkgs, inputs, ... }:
 
 {
   imports = [
@@ -9,6 +9,7 @@
     ./hardware-configuration.nix
     ./../../nixos/common.nix
     ./../../nixos/builders.nix
+    inputs.jovian-nixos.nixosModules.jovian
   ];
 
   # Bootloader.
@@ -43,14 +44,7 @@
       layout = "us";
       variant = "";
     };
-    # AI
-    # ollama = {
-    #   enable = true;
-    #   acceleration = "rocm";
-    # };
-    # open-webui = {
-    #   enable = true;
-    # };
+    envfs.enable = true;
   };
 
   programs.kdeconnect.enable = true;
@@ -167,32 +161,17 @@
   hardware.bluetooth.enable = true;
   hardware.bluetooth.powerOnBoot = true;
 
-  programs.steam.gamescopeSession = {
-    enable = false;
-    env = {
-      WLR_RENDERER = "vulkan";
-      DXVK_HDR = "1";
-      STEAM_GAMESCOPE_VRR_SUPPORTED = "1";
-      SDL_VIDEO_MINIMIZE_ON_FOCUS_LOSS = "0";
-      ENABLE_GAMESCOPE_WSI = "1";
-      WINE_FULLSCREEN_FSR = "1";
+  jovian = {
+    steam = {
+      enable = true;
+      user = "thilo";
     };
-    args = [
-      "-f"
-      "-F fsr"
-      "--rt"
-      "--adaptive-sync"
-      "-w 1920"
-      "-h 1080"
-      "-r 120"
-      "--hdr-enabled"
-      "--hdr-itm-enable"
-      "-O DP-3"
-    ];
   };
 
   programs.gamescope.enable = true;
 
+  networking.firewall.enable = false;
+
   system.stateVersion = "24.11";
 
   environment.systemPackages = with pkgs; [