feat()：添加聊天记录

src/components/Tinymce/index.vue

@@ -139,6 +139,7 @@ export default {
         fontsize_formats: '0pt 8pt 10pt 12pt 14pt 18pt 24pt 36pt',
         link_title: false,
         image_dimensions: false,
+        content_style: "div {margin: 0px; border:0px ; padding: 0px}",
         nonbreaking_force_tab: true, // inserting nonbreaking space   need Nonbreaking Space Plugin
         init_instance_callback: editor => {
           if (_this.value) {