fix(editor): 修复编辑器样式和功能问题

修复编辑器容器高度设置问题，统一h2标签为h1
调整图片和视频的显示样式，修复表格背景色
优化编辑器工具栏功能，修复链接插入逻辑

css/details.less

@@ -200,20 +200,25 @@
 
                 img {
                     max-width: 100%;
-                    display: block;
+                    display: inline-block;
                 }
 
                 video {
                     margin: 0 auto;
                 }
 
-                h2 {
+                h1 {
                     font-family: "PingFangSC-Semibold", "PingFang SC Semibold", "PingFang SC", sans-serif;
                     font-weight: 650;
                     color: #000000;
                     font-size: 18px;
                     line-height: 30px;
                 }
+
+                tr,
+                td {
+                    background: transparent;
+                }
             }
 
             .last-time {