长文图片缩放：编辑器拖拽把手的比例在文章页生效（alt 数字还原为宽度并居中）+ 把手默认半透明提高可发现性

frontend/src/ui/yohaku/YohakuArticle.vue

@@ -1,6 +1,6 @@
 <script setup>
 import { computed, onBeforeUnmount, onMounted, ref } from 'vue'
-import { sanitizeHtml } from '../../utils'
+import { applyImageRatio, sanitizeHtml } from '../../utils'
 import { openLightbox } from '../../lightbox'
 import CommentSection from '../../components/comments/CommentSection.vue'
 import LinkCard from '../../components/LinkCard.vue'
@@ -168,7 +168,7 @@ function onTocClick(e) {
         <!-- 短文不渲染标题：正文第一句就是全部，再给个截断标题是重复 -->
         <h1 v-if="isShort" class="sr-only">{{ title }}</h1>
 
-        <div class="prose" :class="{ 'prose-note': isShort }" v-html="sanitizeHtml(props.contentHtml)" />
+        <div class="prose" :class="{ 'prose-note': isShort }" v-html="applyImageRatio(sanitizeHtml(props.contentHtml))" />
 
         <!-- 短文配图：Twitter 式网格（快发盒上传）；点图开预览 -->
         <div