nixvim: add zen-mode.nvim plugin with keymap

Co-Authored-By: Claude Sonnet 4.6 <[email protected]>

modules/home/nixvim/keymaps.nix

@@ -59,6 +59,9 @@ in {
     (mk "<leader>gh" "<cmd>DiffviewFileHistory %<CR>" "ファイル履歴")
     (mk "<leader>gq" "<cmd>DiffviewClose<CR>" "差分を閉じる")
 
+    # Zen Mode
+    (mk "<leader>zz" "<cmd>ZenMode<CR>" "Zen Modeを開く/閉じる")
+
     # UFO (folding)
     (mkRaw "zR" "require('ufo').openAllFolds" "全て展開")
     (mkRaw "zM" "require('ufo').closeAllFolds" "全て折りたたむ")

modules/home/nixvim/plugins/ui/default.nix

@@ -13,5 +13,6 @@
     ./dropbar.nix
     ./scrollbar.nix
     ./ufo.nix
+    ./zen-mode.nix
   ];
 }

modules/home/nixvim/plugins/ui/zen-mode.nix

@@ -0,0 +1,8 @@
+{ pkgs, ... }: {
+  programs.nixvim = {
+    extraPlugins = [ pkgs.vimPlugins.zen-mode-nvim ];
+    extraConfigLua = ''
+      require("zen-mode").setup()
+    '';
+  };
+}