Rename azos-core station suite to desktop; move discord out to azos/features

Mirrors the azos-core change: station is renamed desktop (its apps are
generically useful on any machine, work included), discord moves to its
own standalone azos/features/discord (personal-only, so it lives in the
azos project rather than azos-core), and azos-emacs-station becomes
azos-emacs-desktop in lauretta's emacs config to match.

AGENTS.md

@@ -128,7 +128,7 @@ All features follow this flake-parts registration pattern:
 
 ### Naming Conventions
 - Option paths: `azos.<module-name>.<option>`
-- Module names: kebab-case (`git-config`, `station`)
+- Module names: kebab-case (`git-config`, `desktop`)
 - Feature directories: kebab-case, one `default.nix` per feature
 - Variables: kebab-case
 
@@ -174,8 +174,13 @@ Top-level suites group related features (defined in `azos-core/`):
 - `azos.suites.base` — base packages and config
 - `azos.suites.editor` — editor tools
 - `azos.suites.dev` — development tools
-- `azos.suites.station` — desktop applications
-- `azos.suites.exwm` — EXWM window manager
+- `azos.suites.desktop` — desktop session plumbing (flameshot, dunst, keyboard layout) plus generally-useful apps (browser, libreoffice, zoom, spotify, gimp, whatsapp). Shared, lives in azos-core — wanted on any GUI machine, work included.
+- `azos.suites.exwm` — EXWM window manager, depends on `desktop`
+
+Machine-specific, personal-only apps (steam, discord) are **not** part of any azos-core
+suite — they live as standalone features directly in `azos/features/`, imported only on
+machines that want them (e.g. `azos/features/discord`, `azos/features/steam`), since any
+such machine already uses the `azos` project rather than a different downstream repo.
 
 The machine suite (`azos.suites.lauretta`) enables the relevant suites for this machine.
 

features/discord/default.nix

@@ -0,0 +1,16 @@
+{...}: {
+  config.flake.modules.homeManager.discord = {
+    lib,
+    config,
+    pkgs,
+    ...
+  }: {
+    options.azos.discord.enable = lib.mkOption {
+      default = true;
+      type = lib.types.bool;
+    };
+    config = lib.mkIf config.azos.discord.enable {
+      home.packages = with pkgs; [discord];
+    };
+  };
+}

features/lauretta/emacs/_pkg.nix

@@ -12,7 +12,7 @@ orgTrivialBuild {
     pkgs.azos-emacs-dev
     pkgs.azos-emacs-editor
     pkgs.azos-emacs-exwm
-    pkgs.azos-emacs-station
+    pkgs.azos-emacs-desktop
 
     agent-shell
     elfeed-protocol

features/lauretta/emacs/config.org

@@ -9,7 +9,7 @@
 (require 'azos-emacs-dev)
 (require 'azos-emacs-editor)
 (require 'azos-emacs-exwm)
-(require 'azos-emacs-station)
+(require 'azos-emacs-desktop)
 #+end_src
 
 * Lauretta specific

home-manager/home.nix

@@ -11,7 +11,8 @@
     suiteModules.homeManager.base
     suiteModules.homeManager.dev
     suiteModules.homeManager.editor
-    suiteModules.homeManager.station
+    suiteModules.homeManager.desktop
+    suiteModules.homeManager.discord
     suiteModules.homeManager.exwm
     suiteModules.homeManager.lauretta
     suiteModules.homeManager.audio