Update lockfile, enable Prism Launcher bump Helium

- Refresh flake.lock with newer revisions and hashes
- Enable Prism Launcher in Garand‑Desktop home modules
- Bump Helium AppImage to version 0.18.3.1
- Comment out noctalia homeModules import in core user config
- Add `checkConfig = true` for Noctalia program settings

modules/core/user.nix

@@ -39,7 +39,7 @@
       imports = [
         ./../home
         ../../hosts/${host}/home-modules.nix
-        inputs.noctalia.homeModules.default
+        # inputs.noctalia.homeModules.default
       ];
       home = {
         username = "${username}";