Refactor home modules and update printing comments

Add placeholder publishing settings in printing module.

Refactor Codex module to add nodejs to home packages and nest the
program configuration under `config`. Simplify Opencode validation by
removing the TUI validation flag, keeping only `config`.

modules/home/codex/default.nix

@@ -6,13 +6,19 @@
 }: {
   options.codex.enable = lib.mkEnableOption "Codex";
 
-  config.programs.codex = lib.mkIf config.codex.enable {
-    enable = true;
-    package = pkgs.codex;
-    mutableSettings = true;
-    # skills = {
-    #   beads = "${pkgs.beads.src}/plugins/beads/skills/beads";
-    # };
+  config = lib.mkIf config.codex.enable {
+    home.packages = [
+      pkgs.nodejs
+    ];
+
+    programs.codex = {
+      enable = true;
+      package = pkgs.codex;
+      mutableSettings = true;
+      # skills = {
+      #   beads = "${pkgs.beads.src}/plugins/beads/skills/beads";
+      # };
+    };
   };
 
   imports = [