re-organize nixvim

programs/nixvim/plugins/ui.nix

@@ -0,0 +1,40 @@
+{ ... }:
+
+{
+  programs.nixvim = {
+    # Colorscheme
+    colorschemes.tokyonight = {
+      enable = true;
+      settings = {
+        style = "night";
+        on_colors.__raw = "function(colors) colors.bg = \"#000000\" end";
+      };
+    };
+
+    plugins = {
+      # Icons for file types
+      web-devicons.enable = true;
+
+      # Color highlighter (shows colors in code)
+      colorizer = {
+        enable = true;
+        settings.user_default_options.names = false;
+      };
+
+      # Indentation guides
+      indent-blankline.enable = true;
+
+      # Markdown preview with live rendering
+      markview.enable = true;
+
+      # UI component library
+      nui.enable = true;
+
+      # Loading/progress indicators
+      fidget.enable = true;
+
+      # Status line (imported from separate file)
+      # lualine is in lualine.nix
+    };
+  };
+}