statusline: Show lsp icon only if client is active for current buffer

lua/plugins/statusline.lua

@@ -117,7 +117,14 @@ gls.right[1] = {
         provider = function()
             local clients = vim.lsp.get_active_clients()
             if next(clients) ~= nil then
-                return " " .. "  " .. " LSP "
+                local buf_ft = vim.api.nvim_buf_get_option(0, "filetype")
+                for _, client in ipairs(clients) do
+                    local filetypes = client.config.filetypes
+                    if filetypes and vim.fn.index(filetypes, buf_ft) ~= -1 then
+                        return " " .. "  " .. " LSP "
+                    end
+                end
+                return ""
             else
                 return ""
             end