update

lua/init.lua

@@ -8,6 +8,7 @@ vim.diagnostic.config({
     update_in_insert = false,
     severity_sort = true,
     float = {
+        border = "single",
         source = "always" -- Or "if_many"
     }
 })
@@ -24,6 +25,11 @@ local border = {
     {"└", "FloatBorder"}, {"│", "FloatBorder"}
 }
 
+vim.lsp.handlers["textDocument/hover"] =
+    vim.lsp.with(vim.lsp.handlers.hover, {border = "single"})
+vim.lsp.handlers["textDocument/signatureHelp"] =
+    vim.lsp.with(vim.lsp.handlers.signature_help, {border = "single"})
+
 local orig_util_open_floating_preview = vim.lsp.util.open_floating_preview
 function vim.lsp.util.open_floating_preview(contents, syntax, opts, ...)
     opts = opts or {}