chore: update flake.lock

* updated noctalia-shell to v3.8.2
* removed television fish integration workaround
* removed `~/.config/fish/fish_variables` entry in my.persist.homeFiles
  since [fish v4.3.0](https://github.com/fish-shell/fish-shell/releases/tag/4.3.0)
  no longer sets universal variables by default

modules/desktop/wm/niri/default.nix

@@ -70,6 +70,7 @@ in
 
       programs.noctalia-shell = {
         enable = true;
+        systemd.enable = true;
         # modified from official Tokyo-Night theme
         colors = {
           mError = "#f7768e";