优化 agent 信息上报与 ARM 安装面板的错误提示

resource/static/main.js

@@ -1,7 +1,10 @@
 function readableBytes(bytes) {
+  if (!bytes) {
+    return '0B'
+  }
   var i = Math.floor(Math.log(bytes) / Math.log(1024)),
     sizes = ["B", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"];
-  return (bytes / Math.pow(1024, i)).toFixed(0) + " " + sizes[i];
+  return parseFloat((bytes / Math.pow(1024, i)).toFixed(2)) + sizes[i];
 }
 
 const confirmBtn = $(".mini.confirm.modal .positive.button");