feat(home-manager): add core+extras profile and wire it into vps

Introduce myHomeProfile.extraPrograms (mirrors myPackages.extra) so each
host's NixOS config declares which extra Home Manager modules it needs
on top of a shared core (fish, starship, btop, git). miku-homelab's
former home.nix becomes its extras list; vps gets home-manager for the
first time using core alone.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

flake.nix

@@ -54,7 +54,9 @@
             home-manager.sharedModules = [
               plasma-manager.homeModules.plasma-manager
             ];
-            home-manager.users.emmatherock = import ./home/emmatherock/home.nix;
+            home-manager.users.emmatherock = { osConfig, ... }: {
+              imports = [ ./home/emmatherock/core.nix ] ++ osConfig.myHomeProfile.extraPrograms;
+            };
           }
         ];
       };
@@ -65,8 +67,17 @@
         specialArgs = { inherit inputs; };
         modules = [
           ./hosts/vps
+          home-manager.nixosModules.home-manager
           vscode-server.nixosModules.default
           agenix.nixosModules.default
+          {
+            home-manager.useGlobalPkgs = true;
+            home-manager.useUserPackages = true;
+            home-manager.extraSpecialArgs = { inherit inputs; };
+            home-manager.users.emmatherock = { osConfig, ... }: {
+              imports = [ ./home/emmatherock/core.nix ] ++ osConfig.myHomeProfile.extraPrograms;
+            };
+          }
         ];
       };
     };

home/emmatherock/core.nix

@@ -0,0 +1,11 @@
+{
+  imports = [
+    ./git.nix
+    ./shell.nix
+  ];
+
+  programs.home-manager.enable = true;
+  programs.btop.enable = true;
+
+  home.stateVersion = "25.11";
+}

home/emmatherock/home.nix

@@ -1,18 +0,0 @@
-{
-  imports = [
-    ./agents.nix
-    ./audio.nix
-    ./desktop-apps.nix
-    ./deskflow.nix
-    ./gaming.nix
-    ./git.nix
-    ./media.nix
-    ./packages.nix
-    ./plasma.nix
-    ./shell.nix
-    ./vscode.nix
-  ];
-
-  programs.home-manager.enable = true;
-  home.stateVersion = "25.11";
-}

home/emmatherock/packages.nix

@@ -1,10 +1,11 @@
 { pkgs, ... }:
 {
+  programs.btop.package = pkgs.btop.override { cudaSupport = false; rocmSupport = true; };
+
   home.packages = with pkgs; [
     # --- Base y Terminal ---
     vim
     fastfetch
-    (btop.override { cudaSupport = false; rocmSupport = true; })
     nvtopPackages.full
   ];
 }

hosts/miku-homelab/default.nix

@@ -6,6 +6,7 @@
     ../../modules/profiles/desktop.nix
     ../../modules/profiles/server.nix
     ../../modules/services/samba.nix
+    ../../modules/system/home-profile.nix
     ../../modules/system/nix-ld.nix
     ../../modules/system/packages.nix
   ];
@@ -19,6 +20,18 @@
     steam-run
   ];
 
+  myHomeProfile.extraPrograms = [
+    ../../home/emmatherock/agents.nix
+    ../../home/emmatherock/audio.nix
+    ../../home/emmatherock/desktop-apps.nix
+    ../../home/emmatherock/deskflow.nix
+    ../../home/emmatherock/gaming.nix
+    ../../home/emmatherock/media.nix
+    ../../home/emmatherock/packages.nix
+    ../../home/emmatherock/plasma.nix
+    ../../home/emmatherock/vscode.nix
+  ];
+
   myNetworking = {
     hostName = "miku-homelab";
     useNetworkManager = true;

hosts/vps/default.nix

@@ -1,9 +1,10 @@
-{ config, ... }:
+{ config, pkgs, ... }:
 
 {
   imports = [
     ./hardware-configuration.nix
     ../../modules/profiles/server.nix
+    ../../modules/system/home-profile.nix
     ../../modules/system/packages.nix
   ];
 
@@ -39,6 +40,7 @@
   myUsers = {
     admins.emmatherock = {
       description = "EmmaTheRock";
+      shell = pkgs.fish;
       extraGroups = [ "wheel" ];
       authorizedKeys = [
         "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIA8vfwM5g9RJXqHtqTgNqsYg9SxSm+UMvFqTjBoAsLJ6 emmatherock@MAIN-PC"

modules/system/home-profile.nix

@@ -0,0 +1,8 @@
+{ lib, ... }:
+{
+  options.myHomeProfile.extraPrograms = lib.mkOption {
+    type = lib.types.listOf lib.types.path;
+    default = [ ];
+    description = "Extra Home Manager modules to import for this user, on top of the core profile.";
+  };
+}