Revert "+ 添加全局异常捕获"

This reverts commit 6a49d135881c6b968429874c06dc35e5c06e3980.
Revert "* 修正预览框因将部分格式的文本解释成Url而显示下划线和无法显示颜色"

This reverts commit 89502bb98665c876cb364179d13fe0f7a3aae20e.