feat: consolidate Kanagawa theme and refine Walker and Limine styling

modules/capabilities/niri/default.nix

@@ -3,7 +3,6 @@
   ...
 }:
 let
-  kanagawa = import ../_kanagawa.nix;
   hmModules = config.flake.modules.homeManager;
 in
 {
@@ -28,7 +27,6 @@ in
       ...
     }:
     let
-      palette = kanagawa.palette;
       swapMonitorWorkspaces = import ./_shortcuts.nix { inherit pkgs; };
       machine = config.facts.machine;
     in
@@ -46,8 +44,6 @@ in
           ++ [ swapMonitorWorkspaces ];
       };
 
-      dconf.settings."org/gnome/desktop/interface".color-scheme = "prefer-dark";
-
       wayland.windowManager.niri = {
         enable = true;
         settings = {
@@ -104,12 +100,7 @@ in
             focus-ring.off = { };
             default-column-width.proportion = 1. / 2.;
 
-            border = {
-              width = 3;
-              active-color = palette.accents.blue;
-              inactive-color = palette.subtleBorder;
-              urgent-color = palette.accents.red;
-            };
+            border.width = 3;
           };
 
           debug.honor-xdg-activation-with-invalid-serial = true;