add aspects/gaming/ modules

Gaming-related NixOS and home-manager configuration:
flatpak, hardware, launchers, mangohud, steam

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

aspects/gaming/flatpak.nix

@@ -0,0 +1,23 @@
+{ ... }:
+
+{
+  flake.modules.nixos.gaming-flatpak = { pkgs, ... }: {
+    services.flatpak.packages = [
+      "com.github.k4zmu2a.spacecadetpinball"
+      "com.steamgriddb.SGDBoop"
+      "io.github.Foldex.AdwSteamGtk"
+      "io.itch.itch"
+      "io.mrarm.mcpelauncher"
+      "net.retrodeck.retrodeck"
+      "org.freedesktop.Platform.VulkanLayer.MangoHud/x86_64/25.08"
+      rec {
+        appId = "com.hypixel.HytaleLauncher";
+        sha256 = "01307s44bklc1ldcigcn9n4lm8hf8q793v9fv7w4w04xd5zyh4rv";
+        bundle = "${pkgs.fetchurl {
+          url = "https://launcher.hytale.com/builds/release/linux/amd64/hytale-launcher-latest.flatpak";
+          inherit sha256;
+        }}";
+      }
+    ];
+  };
+}

aspects/gaming/hardware.nix

@@ -0,0 +1,11 @@
+{ ... }:
+
+{
+  flake.modules.nixos.gaming-hardware = { ... }: {
+    hardware = {
+      xpadneo.enable = true;
+      steam-hardware.enable = true; # Allow steam client to manage controllers
+      graphics.enable32Bit = true; # For OpenGL games
+    };
+  };
+}

aspects/gaming/launchers.nix

@@ -0,0 +1,11 @@
+{ ... }:
+
+{
+  flake.modules.nixos.gaming-launchers = { pkgs, ... }: {
+    environment.systemPackages = with pkgs; [
+      clonehero
+      heroic
+      prismlauncher
+    ];
+  };
+}

aspects/gaming/mangohud.nix

@@ -0,0 +1,43 @@
+{ ... }:
+
+{
+  flake.modules = {
+    nixos.gaming-mangohud = { pkgs, ... }: {
+      environment.systemPackages = with pkgs; [
+        mangohud
+      ];
+    };
+
+    homeManager.gaming-mangohud = { config, ... }: {
+      programs.mangohud = {
+        enable = true;
+        enableSessionWide = true;
+        settings = {
+          position = "top-left";
+          fps = true;
+          frametime = false;
+          frame_timing = false;
+          gpu_stats = true;
+          gpu_temp = true;
+          gpu_power = true;
+          cpu_stats = true;
+          cpu_temp = true;
+          cpu_power = true;
+          ram = true;
+          vram = true;
+          gamemode = false;
+          vkbasalt = false;
+          version = false;
+          engine_version = false;
+          vulkan_driver = false;
+          wine = false;
+          time = false;
+          fps_sampling_period = 500;
+          toggle_hud = "Shift_L+F12";
+          toggle_logging = "Ctrl_L+F2";
+          output_folder = "${config.home.homeDirectory}/.local/share/mangohud";
+        };
+      };
+    };
+  };
+}

aspects/gaming/steam.nix

@@ -0,0 +1,17 @@
+{ ... }:
+
+{
+  flake.modules.nixos.gaming-steam = { pkgs, ... }: {
+    environment.systemPackages = with pkgs; [
+      steam-run
+    ];
+
+    programs = {
+      steam = {
+        enable = true;
+        extraCompatPackages = [ pkgs.proton-ge-bin ];
+      };
+      gamemode.enable = true;
+    };
+  };
+}