Refactor to pass host vars as arguments

Remove per‑host imports across flake, modules, and profiles, exposing
needed
variables (system, printer settings, consoleKeyMap, etc.) as arguments.
Drop unused printEnable flags from host variable files.

flake.nix

@@ -65,25 +65,14 @@
     hostDirs = builtins.attrNames (builtins.readDir ./hosts);
 
     mkHost = hostName: let
-      inherit
-        (import ./hosts/${hostName}/variables.nix)
-        host
-        username
-        profile
-        system
-        ;
+      hostVars = import ./hosts/${hostName}/variables.nix;
+      hostPrinterVars = import ./hosts/${hostName}/printers.nix;
     in
       nixpkgs.lib.nixosSystem {
-        inherit system;
-        specialArgs = {
-          inherit inputs;
-          inherit username;
-          inherit host;
-          inherit profile;
-          inherit system;
-        };
+        inherit (hostVars) system;
+        specialArgs = hostVars // hostPrinterVars // {inherit inputs;};
         modules = [
-          ./profiles/${profile}
+          ./profiles/${hostVars.profile}
           nix-flatpak.nixosModules.nix-flatpak
           garandos-tui.nixosModules.garandos-tui
         ];