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>

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"