feat: migrate theme and font to declarative Nix options

core/home/options.nix

@@ -42,7 +42,11 @@ in
     theme = lib.mkOption {
       type = lib.types.str;
       default = schema.home.theme;
-      description = "System theme name.";
+      description = ''
+        System theme name. This is the declarative source of truth.
+        Changing this and running `nomarchy-env-update` (or a system
+        rebuild) will update the entire desktop.
+      '';
     };
     formFactor = lib.mkOption {
       type = lib.types.enum [ "laptop" "desktop" ];
@@ -120,7 +124,11 @@ in
       monospace = lib.mkOption {
         type = lib.types.str;
         default = schema.home.font;
-        description = "System monospace font.";
+        description = ''
+          System monospace font. This is the declarative source of truth.
+          Changing this and running `nomarchy-env-update` (or a system
+          rebuild) will update the entire desktop.
+        '';
       };
     };
     iconsTheme = lib.mkOption {

core/home/state.nix

@@ -28,36 +28,18 @@ let
 in
 {
   # Every assignment uses lib.mkDefault so a downstream /etc/nixos/home.nix
-  # can override the state.json-derived value. Without mkDefault, every
-  # option here would resolve at default priority and conflict on
-  # assignment from the user's config.
+  # can override the value. The Nix options are now the declarative source
+  # of truth. state.json is purely seeded to keep runtime scripts (menu,
+  # summary) in sync with the Nix-level state.
   config = {
     nomarchy = {
-      toggles = {
-        suspend = lib.mkDefault (togglesState.suspend or schema.home.suspend);
-        screensaver = lib.mkDefault (togglesState.screensaver or schema.home.screensaver);
-        idle = lib.mkDefault (togglesState.idle or schema.home.idle);
-        nightlight = lib.mkDefault (togglesState.nightlight or schema.home.nightlight);
-        waybar = lib.mkDefault (togglesState.waybar or schema.home.waybar);
-      };
-      nightlightTemperature = lib.mkDefault (togglesState.nightlightTemperature or schema.home.nightlightTemperature);
-      theme = lib.mkDefault (togglesState.theme or schema.home.theme);
-      wallpaper = lib.mkDefault (togglesState.wallpaper or schema.home.wallpaper);
-      panelPosition = lib.mkDefault (togglesState.panelPosition or schema.home.panelPosition);
-      hyprland = {
-        gaps_in = lib.mkDefault (togglesState.hyprland.gaps_in or schema.home.hyprland.gaps_in);
-        gaps_out = lib.mkDefault (togglesState.hyprland.gaps_out or schema.home.hyprland.gaps_out);
-        border_size = lib.mkDefault (togglesState.hyprland.border_size or schema.home.hyprland.border_size);
-      };
-      fonts.monospace = lib.mkDefault (togglesState.font or schema.home.font);
-
       # Derived properties from the theme directory
       isLightMode = lib.mkDefault (nomarchyLib.isThemeLightMode {
-        themeName = togglesState.theme or schema.home.theme;
+        themeName = cfg.theme;
         inherit assetsPath;
       });
       iconsTheme = lib.mkDefault (nomarchyLib.getIconsTheme {
-        themeName = togglesState.theme or schema.home.theme;
+        themeName = cfg.theme;
         inherit assetsPath;
       });
     };