Fixed Hyprland config errors for installation

modules/system.nix

@@ -46,9 +46,8 @@
     tree
   ];
 
-  # Enable sound
-  sound.enable = true;
-  hardware.pulseaudio.enable = false;
+  # Enable sound with PipeWire (removed deprecated sound.enable)
+  services.pulseaudio.enable = false;
   security.rtkit.enable = true;
   services.pipewire = {
     enable = true;
@@ -61,11 +60,10 @@
   # Enable CUPS for printing
   services.printing.enable = true;
 
-  # Enable OpenGL
-  hardware.opengl = {
+  # Enable graphics (updated from hardware.opengl)
+  hardware.graphics = {
     enable = true;
-    driSupport = true;
-    driSupport32Bit = true;
+    enable32Bit = true;
   };
 
   # Enable Bluetooth