Many improvements.

lua/config/opts.lua

@@ -1,9 +1,22 @@
 vim.opt.termguicolors = true
 vim.cmd("colorscheme tokyonight")
 
+vim.wo.number = true
+vim.wo.relativenumber = true
+
 vim.diagnostic.config({
 	virtual_text = true,
 	virtual_lines = {
 		current_line = true,
 	},
+	update_in_insert = true,
+	signs = true,
+})
+
+vim.api.nvim_create_autocmd("TextYankPost", {
+	desc = "Highlight when yanking (copying) text",
+	group = vim.api.nvim_create_augroup("highlight-yank", { clear = true }),
+	callback = function()
+		vim.highlight.on_yank()
+	end,
 })