修正富文本预览初始化样式显示

src/views/book/courseware/preview/components/rich_text/RichTextPreview.vue

@@ -30,6 +30,7 @@
           />
           <span
             class="rich-text"
+            :style="getBodyStyles()"
             @mouseover="handleRichFillClick"
             @mouseleave="onLeave"
             v-html="convertText(sanitizeHTML(data.content))"