feat(mibook): add claude-code profile module

Installs claude-code (stable), ripgrep, fd, gh, and jq for user finn.
Includes annotation for future headless service upgrade path.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

machines/mibook/environments.nix

@@ -13,6 +13,7 @@ in
     };
     development.enable = true;
     docker.enable = true;
+    claude-code.enable = true;
   };
 
   my.hardware = {

modules/environments/claude-code/default.nix

@@ -0,0 +1,31 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+let
+  cfg = config.my.profiles.claude-code;
+in
+{
+  options.my.profiles.claude-code = with lib; {
+    enable = mkEnableOption "Claude Code CLI";
+  };
+
+  config = lib.mkIf cfg.enable {
+    users.users.finn.packages = with pkgs; [
+      claude-code
+      ripgrep
+      fd
+      gh
+      jq
+    ];
+
+    # Future: headless Claude Code service
+    # A natural next step is exposing Claude Code as a persistent background service —
+    # e.g. a systemd user service that accepts work via an HTTP API or Unix socket,
+    # triggerable over SSH or a local network endpoint. This would turn the MiBook
+    # into a true remote execution node without requiring an interactive session.
+    # See: my.profiles.claude-code.service.enable (not yet implemented)
+  };
+}

modules/environments/default.nix

@@ -4,6 +4,7 @@
     ./actual
     ./apps
     ./audiobookshelf
+    ./claude-code
     ./development
     ./home-assistant
     ./hyprland