feat(hosts): Add per-host user configuration overrides

Configure different users for each Darwin host:
- MacTraitor-Pro: Uses 'emiller' user (explicit override)
- Seqeratop: Uses 'edmundmiller' user with corrected nix-homebrew config

🤖 Generated with [Claude Code](https://claude.ai/code)

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

Author: edmundmiller

hosts/mactraitorpro/default.nix

@@ -49,6 +49,12 @@
       };
     } // import ./homebrew.nix;
 
+    # Override flake.nix user settings for this host  
+    system.primaryUser = "emiller";
+    users.users.emiller = {
+      home = "/Users/emiller";
+    };
+
     # Enable sudo authentication with Touch ID.
     security.pam.services.sudo_local.touchIdAuth = true;
 

hosts/seqeratop/default.nix

@@ -32,7 +32,7 @@
     # Configure nix-homebrew for proper privilege management
     nix-homebrew = {
       enable = true;
-      user = "emiller";
+      user = "edmundmiller";
       enableRosetta = true;  # Apple Silicon + Intel compatibility
       autoMigrate = true;    # Migrate existing homebrew installation
     };
@@ -83,6 +83,12 @@
       };
     };
 
+    # Override flake.nix user settings for this host
+    system.primaryUser = "edmundmiller";
+    users.users.edmundmiller = {
+      home = "/Users/edmundmiller";
+    };
+
     # set some OSX preferences that I always end up hunting down and changing.
     system.defaults = {
       # minimal dock