update mainUser concept

nixos/components/mainUser.nix

@@ -57,7 +57,6 @@ in
 
   config = mkIf cfg.enable {
 
-
     users = {
 
       mutableUsers = true;
@@ -79,5 +78,21 @@ in
       };
 
     };
+
+    home-manager.users.mainUser.home.file.".mainUser" = {
+      enable = true;
+      text = builtins.toJSON (
+        {
+          mainUser = config.users.users.mainUser.name;
+          normalUser = mapAttrs (_: value: value.name)
+            (filterAttrs (_: value: value.isNormalUser)
+              config.users.users);
+          systemUser = mapAttrs (_: value: value.name)
+            (filterAttrs (_: value: value.isSystemUser)
+              config.users.users);
+        }
+      );
+    };
+
   };
 }

nixos/modules/programs/browser.nix

@@ -253,7 +253,8 @@ in
         createHome = true;
         initialPassword = "${name}-browser";
         shell = pkgs.bashInteractive;
-        isNormalUser = true;
+        isNormalUser = false;
+        isSystemUser = true;
         group = "users";
         # enable video usage
         extraGroups = [ "audio" "pipewire" ] ++ (if config.gpu then [ "video" ] else [ ]);

nixos/modules/programs/steam.nix

@@ -29,11 +29,14 @@ in
     ];
 
     users.users.steam = {
-      isNormalUser = true;
+      isNormalUser = false;
+      isSystemUser = true;
       home = "/home/steam";
       createHome = true;
       extraGroups = [ "audio" "input" "video" "pipewire" ];
+      group = "steam";
     };
+    users.groups.steam = { };
 
     # for steam
     # ---------