add border for split windows and error window

init.lua

@@ -166,6 +166,7 @@ vim.keymap.set('n', '<Esc>', '<cmd>nohlsearch<CR>')
 
 -- Diagnostic keymaps
 vim.keymap.set('n', '<leader>q', vim.diagnostic.setloclist, { desc = 'Open diagnostic [Q]uickfix list' })
+vim.keymap.set('n', '<leader>e', vim.diagnostic.open_float, { desc = 'Show diagnostic [E]rror messages' })
 
 -- Exit terminal mode in the builtin terminal with a shortcut that is a bit easier
 -- for people to discover. Otherwise, you normally need to press <C-\><C-n>, which
@@ -843,7 +844,9 @@ require('lazy').setup({
       -- Like many other themes, this one has different styles, and you could load
       -- any other, such as 'tokyonight-storm', 'tokyonight-moon', or 'tokyonight-day'.
       vim.cmd.colorscheme 'tokyonight-night'
+      vim.g.tokyonight_colors = { border = 'orange' }
       -- vim.cmd.colorscheme 'default'
+      vim.api.nvim_set_hl(0, 'WinSeparator', { fg = vim.g.tokyonight_colors.border })
 
       -- You can configure highlights by doing something like:
       --vim.cmd.hi 'Comment gui=none'