Fix lua_ls diagnostic warnings

lua/config/nvim_ufo.lua

@@ -1,6 +1,5 @@
 local handler = function(virtText, lnum, endLnum, width, truncate)
   local newVirtText = {}
-  local totalLines = vim.api.nvim_buf_line_count(0)
   local foldedLines = endLnum - lnum
   local suffix = (" 󰁂  %d"):format(foldedLines)
   local sufWidth = vim.fn.strdisplaywidth(suffix)

lua/config/statusline.lua

@@ -127,6 +127,7 @@ local get_active_lsp = function()
   end
 
   for _, client in ipairs(clients) do
+    ---@diagnostic disable-next-line: undefined-field
     local filetypes = client.config.filetypes
     if filetypes and vim.fn.index(filetypes, buf_ft) ~= -1 then
       return client.name
@@ -149,7 +150,7 @@ require("lualine").setup {
     lualine_b = {
       {
         "branch",
-        fmt = function(name, context)
+        fmt = function(name, _)
           -- truncate branch name in case the name is too long
           return string.sub(name, 1, 20)
         end,

lua/mappings.lua

@@ -1,5 +1,4 @@
 local keymap = vim.keymap
-local api = vim.api
 local uv = vim.uv
 
 -- Save key strokes (now we do not need to press shift to enter command mode).
@@ -215,6 +214,9 @@ keymap.set("n", "<leader>cb", function()
   local cnt = 0
   local blink_times = 7
   local timer = uv.new_timer()
+  if timer == nil then
+    return
+  end
 
   timer:start(0, 100, vim.schedule_wrap(function()
     vim.cmd [[