refactor: cleanup and extract user config

modules/hosts/polaris/default.nix

@@ -7,13 +7,15 @@ let
   nixosModules = config.flake.modules.nixos;
   homeModules = config.flake.modules.homeManager;
   metaLib = config.meta.lib;
-  workstationHomeImports = [ homeModules.workstation ];
+  workstationHomeImports = [ homeModules.workstation-base ];
   kiriHomeImports = workstationHomeImports ++ [
-    homeModules.syncthing
-    homeModules.qbittorrent-client
+    homeModules.kiri-workstation
+    homeModules.noctalia
+  ];
+  ergonHomeImports = workstationHomeImports ++ [
+    homeModules.ergon-workstation
     homeModules.noctalia
   ];
-  ergonHomeImports = workstationHomeImports ++ [ homeModules.noctalia ];
 in
 {
   flake.modules.nixos.polaris = metaLib.mkHost {
@@ -51,7 +53,7 @@ in
     };
 
     imports = [
-      nixosModules.workstation
+      nixosModules.workstation-base
       nixosModules.steam
       ./_hardware.nix
     ]