update for niri and noctalia

hosts/thinkpad/configuration.nix

@@ -10,9 +10,10 @@
     ../../modules/common/common.nix
     ../../modules/nixos/bootloader.nix
     ../../modules/nixos/user.nix
+    ../../modules/nixos/noctalia.nix
     ../../modules/nixos/ssh.nix
     ../../modules/nixos/bluetooth.nix
-    ../../modules/nixos/i3.nix
+    ../../modules/nixos/niri.nix
     ../../modules/nixos/nm.nix
     ../../modules/nixos/sound.nix
     ../../modules/nixos/steam.nix
@@ -24,6 +25,25 @@
 
   i18n.defaultLocale = "en_CA.UTF-8";
 
+  hardware.graphics = {
+    enable = true;
+    extraPackages = with pkgs; [
+      # Required for modern Intel GPUs (Xe iGPU and ARC)
+      intel-media-driver     # VA-API (iHD) userspace
+      vpl-gpu-rt             # oneVPL (QSV) runtime
+
+      # Optional (compute / tooling):
+      #intel-compute-runtime  # OpenCL (NEO) + Level Zero for Arc/Xe
+      # NOTE: 'intel-ocl' also exists as a legacy package; not recommended for Arc/Xe.
+      # libvdpau-va-gl       # Only if you must run VDPAU-only apps
+    ];
+  };
+
+  environment.sessionVariables = {
+    LIBVA_DRIVER_NAME = "iHD";     # Prefer the modern iHD backend
+    # VDPAU_DRIVER = "va_gl";      # Only if using libvdpau-va-gl
+  };
+
   environment.systemPackages = with pkgs; [
     wget
     git