refactor(nix): order let bindings

configs/nixos/modules/desktop/session/waybar.nix

@@ -8,11 +8,12 @@
 let
   cfg = config.modules.desktop.session.waybar; # NOLINT(let_order)
   vpnClient = config.modules.network.vpn-client;
-  user = config.user.name;
 
   # A Nerd Font Private-Use-Area codepoint as a literal character, decoded
   # through JSON so the glyph survives as bytes rather than an editor paste.
   g = code: builtins.fromJSON ''"\u${code}"'';
+  user = config.user.name;
+
   sleepOffIcon = builtins.fromJSON ''"\udb81\udcb3"'';
 
   # Renders and toggles mako's do-not-disturb mode.