fix(options): set default laststatus=3 and set it to 0 before loading dashboard to prevent flickering

lua/lazyvim/plugins/ui.lua

@@ -316,6 +316,7 @@ return {
       return dashboard
     end,
     config = function(_, dashboard)
+      vim.o.laststatus = 0
       -- close Lazy and re-open when the dashboard is ready
       if vim.o.filetype == "lazy" then
         vim.cmd.close()