refactor: complete rewrite

modules/nixos/hardware/features/ssd.nix

@@ -0,0 +1,23 @@
+{
+  lib,
+  config,
+  ...
+}: let
+  inherit (lib) mkIf;
+  inherit (builtins) elem;
+  inherit (config.ooknet.hardware) features;
+in {
+  config = mkIf (elem "ssd" features) {
+    services.fstrim = {
+      enable = true;
+    };
+    # only run fstrim while connected on AC
+    systemd.services.fstrim = {
+      unitConfig.ConditionACPower = true;
+      serviceConfig = {
+        Nice = 19;
+        IOSchedulingClass = "idle";
+      };
+    };
+  };
+}