feat: add gaming applications configuration for NixOS

home/programs/steam/default.nix

@@ -1,27 +1,8 @@
 {
-  pkgs,
   ...
 }: {
-  home.packages = with pkgs; [
-    steam
-    protonup-ng
-  ];
-
-  xdg.desktopEntries = {
-    Steam = {
-      name = "Steam";
-      exec = "${pkgs.steam}/bin/steam";
-      icon = "steam";
-      type = "Application";
-      categories = [
-        "Game"
-        "Network"
-      ];
-      terminal = false;
-    };
-  };
-
   home.sessionVariables = {
+    # Better Steam scaling on HiDPI displays
     STEAM_FORCE_DESKTOPUI_SCALING = "1.25";
   };
 }

home/programs/steam/system.nix

@@ -1,13 +1,27 @@
-{ ... }: {
-  # Steam runtime tweaks (user-session level, not NixOS system config)
+{
+	pkgs,
+	...
+}: {
 
-  home.sessionVariables = {
-    # Improves scaling consistency on HiDPI / Wayland setups
-    STEAM_FORCE_DESKTOPUI_SCALING = "1.25";
-
-    # Optional Proton-related behavior toggles (safe defaults)
-    PROTON_ENABLE_NVAPI = "1";
-    PROTON_NO_ESYNC = "0";
-    PROTON_NO_FSYNC = "0";
+  hardware.graphics = {
+    enable = true;
+    enable32Bit = true;
   };
+
+  programs.steam = {
+    enable = true;
+    gamescopeSession.enable = true;
+
+    remotePlay.openFirewall = true;
+    localNetworkGameTransfers.openFirewall = true;
+
+    extraCompatPackages = with pkgs; [
+      proton-ge-bin
+    ];
+  };
+
+  programs.gamescope.enable = true;
+  programs.gamemode.enable = true;
+
+  hardware.steam-hardware.enable = true;
 }