add module for gaming

modules/default.nix

@@ -11,6 +11,7 @@ let
     boot
     core
     chromium
+    gaming
     easyroam
     nautilus
     packages

modules/system/programs/default.nix

@@ -1,7 +1,6 @@
 { ... }: {
   flake.nixosModules.programs = {
     programs.niri.enable = true;
-    programs.steam.enable = true;
     programs.direnv.enable = true;
   };
 }

modules/system/programs/gaming.nix

@@ -0,0 +1,26 @@
+{
+  flake.nixosModules.gaming =
+    { pkgs, ... }:
+    {
+      programs.steam = {
+        enable = true;
+        extraCompatPackages = with pkgs; [ proton-ge-bin ];
+        protontricks.enable = true;
+        remotePlay.openFirewall = true;
+        localNetworkGameTransfers.openFirewall = true;
+      };
+
+      programs.gamescope = {
+        enable = true;
+        capSysNice = true;
+        enableWsi = true;
+      };
+
+      programs.gamemode.enable = true;
+
+      environment.systemPackages = with pkgs; [
+        heroic # Epic-Fassung von Rocket League (braucht GE-Proton)
+        umu-launcher # Proton-Runtime für Heroic / Nicht-Steam-Games
+      ];
+    };
+}