switch to nixpkgs slack instead of homebrew

modules/common/applications/default.nix

@@ -7,9 +7,10 @@
     ./firefox.nix
     ./kitty.nix
     ./media.nix
+    ./nautilus.nix
     ./obsidian.nix
     ./qbittorrent.nix
-    ./nautilus.nix
+    ./slack.nix
     ./yt-dlp.nix
   ];
 

modules/common/applications/slack.nix

@@ -0,0 +1,19 @@
+{ config, pkgs, lib, ... }: {
+
+  options = {
+    slack = {
+      enable = lib.mkEnableOption {
+        description = "Enable Slack.";
+        default = false;
+      };
+    };
+  };
+
+  config = lib.mkIf (config.gui.enable && config.slack.enable) {
+    unfreePackages = [ "slack" ];
+    home-manager.users.${config.user} = {
+      home.packages = with pkgs; [ slack ];
+    };
+  };
+
+}