feat: consolidate Kanagawa theme and refine Walker and Limine styling

modules/capabilities/sddm.nix

@@ -1,23 +1,10 @@
 {
-  flake.modules.nixos.sddm =
-    {
-      pkgs,
-      ...
-    }:
-    {
-      services.displayManager.sddm = {
-        enable = true;
-        enableHidpi = true;
-        wayland.enable = true;
-        wayland.compositor = "kwin";
-        theme = "${
-          pkgs.sddm-astronaut.override { embeddedTheme = "purple_leaves"; }
-        }/share/sddm/themes/sddm-astronaut-theme";
-        extraPackages = [ pkgs.kdePackages.qtmultimedia ];
-        settings.Theme = {
-          CursorTheme = "phinger-cursors-light";
-          CursorSize = 24;
-        };
-      };
+  flake.modules.nixos.sddm = {
+    services.displayManager.sddm = {
+      enable = true;
+      enableHidpi = true;
+      wayland.enable = true;
+      wayland.compositor = "kwin";
     };
+  };
 }