yank_notification: show line numbers. Clipboard copy notification to have line counts. Fix: Paste clipboard over selection

lua/yank_notification.lua

@@ -0,0 +1,23 @@
+local M = {}
+vim.api.nvim_create_autocmd('TextYankPost', {
+	pattern = '*',
+	callback = function()
+		local content = vim.fn.getreg '"'
+		if not content or content == '' then
+			return
+		end
+		-- Split by newline
+		local lines = vim.split(content, '\n', true)
+		-- Remove trailing empty line if present
+		if lines[#lines] == '' then
+			table.remove(lines, #lines)
+		end
+		local line_count = #lines
+		vim.schedule(function()
+			local plural = line_count == 1 and '' or 's'
+			vim.notify(string.format('Yanked %d line%s', line_count, plural), vim.log.levels.INFO)
+		end)
+	end,
+})
+
+return M