install direnv and switch back to slssteam flake

hosts/desktop/configuration.nix

@@ -137,7 +137,9 @@
     extraCompatPackages = with pkgs; [ proton-ge-bin ];
     package = pkgs.steam.override {
       extraEnv = {
-        LD_AUDIT = "/home/user/Desktop/coding/SLSsteam/bin/library-inject.so:/home/user/Desktop/coding/SLSsteam/bin/SLSsteam.so";
+        LD_AUDIT = "${sls-steam.packages.${pkgs.stdenv.hostPlatform.system}.sls-steam}/library-inject.so:${
+          sls-steam.packages.${pkgs.stdenv.hostPlatform.system}.sls-steam
+        }/SLSsteam.so";
       };
     };
   };

hosts/desktop/packages.nix

@@ -78,7 +78,6 @@
     yabridge
     yabridgectl
     wineWow64Packages.yabridge
-    vital
   ];
 
   fonts.packages = with pkgs; [