Add default settings file support for Dank Material Shell (DMS)

- Introduced a new option `defaultSettingsFile` in the DMS configuration to allow host-specific first-run settings.
- Updated the home-manager module to read from the specified settings file if provided, otherwise falling back to the bundled defaults.
- Enhanced the documentation in the default settings file to clarify its purpose and usage.

modules/desktop/shells/dms/_private/default-settings.nix

@@ -1,5 +1,6 @@
-# Defaults written once to ~/.config/DankMaterialShell/settings.json on first login.
-# After that, DMS settings are owned by the UI — rebuilds do not overwrite them.
+# Generic defaults written once to ~/.config/DankMaterialShell/settings.json on first login.
+# Hosts can override via `chiasson.desktop.shells.dms.defaultSettingsFile` (see 14900k).
+# After seeding, DMS settings are owned by the UI — rebuilds do not overwrite them.
 {
   lib,
   gpuTempEnabled ? true,

modules/desktop/shells/dms/default.nix

@@ -38,6 +38,15 @@
         example = [ "sudo" "nixos-rebuild" "switch" "--flake" ".#14900k" ];
         description = "Command used by DMS nix-monitor widget for rebuild actions.";
       };
+      defaultSettingsFile = lib.mkOption {
+        type = lib.types.nullOr lib.types.path;
+        default = null;
+        example = ./dms-default-settings.json;
+        description = ''
+          Host-specific first-run `settings.json` seed. When set, replaces the bundled
+          `default-settings.nix` template on fresh profiles.
+        '';
+      };
     };
   };
 
@@ -85,6 +94,7 @@
         ])
         ++ (cfg.extraRightBarWidgets or [ ]);
       programs.nix-monitor.rebuildCommand = rebuildCommand;
+      dms.defaultSettingsFile = cfg.defaultSettingsFile or null;
     };
   };
 }

modules/desktop/shells/dms/home-manager/default.nix

@@ -59,10 +59,14 @@
   '';
 
   jsonFormat = pkgs.formats.json { };
-  dmsSeedSettings = import ../_private/default-settings.nix {
-    inherit lib gpuTempEnabled;
-    extraRightBarWidgets = cfg.extraRightBarWidgets;
-  };
+  dmsSeedSettings =
+    if cfg.defaultSettingsFile != null then
+      builtins.fromJSON (builtins.readFile cfg.defaultSettingsFile)
+    else
+      import ../_private/default-settings.nix {
+        inherit lib gpuTempEnabled;
+        extraRightBarWidgets = cfg.extraRightBarWidgets;
+      };
   dmsSeedFile = jsonFormat.generate "dms-settings-seed.json" dmsSeedSettings;
   dmsSettingsPath = "${config.xdg.configHome}/DankMaterialShell/settings.json";
 
@@ -126,6 +130,15 @@ in {
     dms.enableRbwLockToggle = lib.mkEnableOption ''
       Ship rbw-lock-toggle into `~/.config/DankMaterialShell/plugins/rbwLockToggle/` (directory name matches plugin id; Bitwarden vault lock/unlock in the bar).
     '';
+
+    dms.defaultSettingsFile = lib.mkOption {
+      type = lib.types.nullOr lib.types.path;
+      default = null;
+      description = ''
+        Host-specific first-run `settings.json` seed. When set, replaces the bundled
+        `default-settings.nix` template on fresh profiles.
+      '';
+    };
   };
 
   imports = [