Fix: betterlockscreen in its own file

hm/common/betterlockscreen.nix

@@ -0,0 +1,21 @@
+{ pkgs, ... }:{
+  home.packages = with pkgs; [
+    xidlehook
+    betterlockscreen
+  ];
+
+  systemd.user.services.xidlehook = {
+    Unit.Description = "Idle: lock at 5min, suspend at ~8min";
+    Service = {
+      ExecStart = ''
+        ${pkgs.xidlehook}/bin/xidlehook \
+          --detect-sleep \
+          --not-when-fullscreen \
+          --timer 300  "${pkgs.betterlockscreen}/bin/betterlockscreen -l dim" "" \
+          --timer 500  "systemctl suspend" ""
+      '';
+      Restart = "always";
+    };
+    Install.WantedBy = ["graphical-session.target"];
+  };
+}