Add GNOME Extension Manager on GNOME-enabled NixOS hosts

pkgs.gnome-extension-manager joins gnome-tweaks in the osConfig-gated
list added in the prior change, so it's provisioned only where GNOME
is actually enabled rather than on any Linux system.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HngxrvqEzq8oBEBDtrYJyB

1 files changed, 4 insertions, 2 deletions

diff --git a/modules/home/desktop-apps.nix b/modules/home/desktop-apps.nix
index a565c18..22a7892 100644
--- a/modules/home/desktop-apps.nix
+++ b/modules/home/desktop-apps.nix
@@ -19,8 +19,10 @@ let
   # standalone, non-NixOS activations of this shared profile. osConfig is the
   # full NixOS config and is only present when home-manager is integrated
   # into a NixOS system; it's absent for standalone `home-manager switch`.
-  gnomeOnlyApps = lib.optional (osConfig.services.desktopManager.gnome.enable or false
-  ) pkgs.gnome-tweaks;
+  gnomeOnlyApps = lib.optionals (osConfig.services.desktopManager.gnome.enable or false) [
+    pkgs.gnome-tweaks
+    pkgs.gnome-extension-manager
+  ];
   candidateApps = crossPlatformApps ++ linuxOnlyApps ++ gnomeOnlyApps;
 in
 {