Fix GoofCord identity by enabling native Wayland mode

Set NIXOS_OZONE_WL=1 so Electron runs on Wayland natively and sets
the correct app_id, matching the .desktop file's StartupWMClass.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

hosts/FredOS-Gaming.nix

@@ -13,7 +13,7 @@
       (goofcord.overrideAttrs (old: {
         postFixup = (old.postFixup or "") + ''
           substituteInPlace $out/bin/goofcord \
-            --replace-fail '/bin/electron"' '/bin/electron" --class=GoofCord'
+            --replace-fail 'exec -a "$0"' 'NIXOS_OZONE_WL=1 exec -a "$0"'
         '';
       }))
       lsfg-vk