[nvim] fix zenmode conf

private_dot_config/nvim/lua/plugins/zenmode.lua

@@ -1,4 +1,33 @@
 return {
-  { "folke/zen-mode.nvim", ft = "mail" },
+  {
+    "folke/zen-mode.nvim",
+    ft = "mail",
+    config = function()
+      require("zen-mode").setup({
+
+        window = { width = 0.85 },
+
+        on_close = function()
+          local is_last_buffer = #vim.fn.filter(vim.fn.range(1, vim.fn.bufnr("$")), "buflisted(v:val)") == 1
+
+          if vim.api.nvim_buf_get_var(0, "quitting") == 1 and is_last_buffer then
+            if vim.api.nvim_buf_get_var(0, "quitting_bang") == 1 then
+              vim.cmd("qa!")
+            else
+              vim.cmd("qa")
+            end
+          end
+        end,
+
+        on_open = function()
+          vim.api.nvim_buf_set_var(0, "quitting", 0)
+          vim.api.nvim_buf_set_var(0, "quitting_bang", 0)
+          vim.cmd([[autocmd! QuitPre <buffer> let b:quitting = 1]])
+          vim.cmd("cabbrev <buffer> q! let b:quitting_bang = 1 <bar> q!")
+        end,
+      })
+    end,
+  },
+
   { "folke/twilight.nvim", ft = "mail" },
 }