cleanup common configs + disable CONFIG_VT if kmscon is enabled

modules/desktop-common.nix

@@ -10,10 +10,7 @@
 }:
 {
   imports = [
-    # shared across all hosts
-    ./common-doas.nix
-    ./common-shell-fish.nix
-    ./common-nix.nix
+    ./common.nix
 
     # desktop-only modules
     ./desktop-vm.nix
@@ -34,8 +31,6 @@
   hardware.enableRedistributableFirmware = true;
   hardware.cpu.amd.updateMicrocode = true;
 
-  services.kmscon.enable = true;
-
   # Add niri to display manager session packages
   services.displayManager.sessionPackages = [ niri-package ];
 
@@ -255,6 +250,8 @@
           SGETMASK_SYSCALL = lib.mkForce no;
           UID16 = lib.mkForce no;
           X86_X32_ABI = lib.mkForce no;
+
+          VT = lib.mkForce (!config.services.kmscon.enable);
         };
       }
     ];